Azo dye with a 3-cyano- or 3-carbamoyl-4-methyl-2,6-diamino-pyridine coupling component

ABSTRACT

Azo dyes of the formula ##STR1## wherein D is the diazo component, the R substituents represent hydrogen or various organic radicals and X is cyano or carbamoyl. The R members are hydrogen, an alkyl or other aliphatic group as well as other selected groups including heterocyclic rings formed by R + R 1  and R 2  + R 3  with the nitrogen atom. The dyes are eminently suitable for dyeing polyamides, cellulose esters, acrylonitrile polymers and particularly polyesters brilliant yellow to blue shades of excellent fastness properties to dry-heat pleating and setting and also to light.

This application is a continuation-in-part of U.S. application Ser. No. 209,431 filed on Dec. 17, 1971, now abandoned.

The invention relates to dyes of the general formula: ##STR2## in which

D denotes the radical of a diazo component of the benzene, naphthalene, diphenyl, azobenzene, benzothiazole, thiophene, benzoisothiazole, thiazole, thiadiazole, triazole, benzotriazole, indazole, pyrazole or anthraquinone series;

X denotes cyano or carbamoyl;

R denotes hydrogen; alkyl of one to eight carbon atoms, alkyl bearing as substituents hydroxy, alkoxy of one to eight carbon atoms, carboxy, carbalkoxy of two to six carbon atoms, acyloxy of one to ten carbon atoms, or alkylamino of a total of up to eight carbon atoms, the alkyl if desired being interrupted by oxygen; phenyl; phenyl bearing chlorine, methyl, ethyl, β-hydroxyethyl, methoxy or ethoxy as substituents; cyclohexyl; benzyl; phenylethyl or omega-N-pyrrolidonylalkyl of two or three carbon atoms in the alkyl radical;

R¹ denotes hydrogen, alkyl of one to eight carbon atoms or alkyl bearing hydroxy, alkoxy of one to eight carbon atoms or alkylamino of a total of up to eight carbon atoms as substituents;

R and R¹ together with the nitrogen denote the radical of pyrrolidine, piperidine, morpholine, piperazine or N-methylpiperazine, and independently of one another

R² has the same meanings as R,

R³ has the same meanings as R¹ and

R² and R³ have the same meanings as R + R¹.

The following are examples of subsituents for the radical D of the diazo components:

IN THE BENZENE SERIES: CHLORINE, BROMINE, NITRO, CYANO, TRIFLUOROMETHYL, METHYLSULFONYL, ETHYLSULFONYL, PHENYLSULFONYL, P-(β-HYDROXYETHYLPHENYL)-SULFONYL, CARBOMETHOXY, CARBOETHOXY, CARBOBUTOXY, CARBO-β-METHOXYETHOXY, CARBO-β-ETHYLHEXOXY, CARBOPROPOXY, CARBO-β-HYDROXYETHOXY, UNSUBSTITUTED CARBAMOYL OR SULFONAMIDO, N-monosubstituted or N-disubstituted carbamoyl or sulfonamido, methyl, ethyl, methoxy and ethoxy;

Examples of N-substituents for the carboxamides or sulfonamides are methyl, ethyl, propyl, butyl, β-ethylhexyl, cyclohexyl, benzyl, phenylethyl, β-hydroxyethyl, β-hydroxypropyl, β-methoxyethyl, and γ-methoxypropyl as well as pyrrolidide, piperidide and morpholide.

in the azobenzene series: chlorine, bromine, nitro, cyano, carbalkoxy, methyl, ethyl, methoxy, ethoxy, hydroxy, acetylamino, formyl, β-hydroxyethoxy and ethoxycarbonylamino;

in the heterocyclic series: chlorine, bromine, nitro, cyano, methyl, ethyl, phenyl, methoxy, ethoxy, methylmercapto, β-carbomethoxyethylmercapto, β-carboethoxyethylmercapto, carbomethoxy, carboethoxy, methylsulfonyl and ethylsulfonyl.

In addition to the radicals already mentioned individually, R, R¹, R² and R³ may denote for example:

methyl, ethyl, propyl, butyl, hexyl, β-ethylhexyl, β-hydroxyethyl, β-hydroxypropyl, γ-hydroxypropyl, ω-hydroxyhexyl, β-methoxyethyl, γ-methoxypropyl, β-ethoxyethyl, γ-ethoxypropyl, γ-isopropoxypropyl, γ-butoxypropyl, β-aminoethyl, γ-dimethylaminopropyl, γ-dibutylaminopropyl and ω-aminohexyl and also the radicals of the formulae: ##STR3## --CH₂ =CH--CH₂, --(CH₂)₃ O(CH₂)₄ OH, --(CH₂)₃ OC₂ H₄ OCH₃, --(CH₂)₃ OC₂ H₄ OC₆ H₅, --CH₂ --CHOHC₆ H₅, ##STR4## CH₂ COOH, C₂ H₄ COOH, --(CH₂)₃ COOH and --(CH₂)₅ COOH.

Examples of acyloxyalkyl radicals are:

--CH₂ --CH₂ --O--acyl, --CH₂ --CH₂ --CH₂ --O--acyl, ##STR5## --CH₂ --CH₂ --CH₂ --CH₂ --O--acyl, --CH₂ --CH₂ --CH₂ --CH₂ --CH₂ --CH₂ --O--acyl, --CH₂ --CH₂ --O--CH₂ --CH₂ --O--acyl, ##STR6## and --CH₂ --CH₂ --CH₂ --O--CH₂ --CH₂ --CH₂ --CH₂ --O--acyl.

Examples of acyl radicals are the following: --CO--H, --CO--CH₃, --CO--CH₂ --CH₃, --CO--CH(CH₃)₂, ##STR7## --CO--CH₂ --CO--CH₃, --CO--CH₂ --Cl, --CO--CH₂ --CH₂ --Cl, --CO--=CH₂, --CO--CH=CH--CH₃, ##STR8## --CO--CH=CH--COOH, --CO--CH₂ --CH₂ --COOH, --CO--CH₂ --CH₂ --COO--C₂ H₅, ##STR9## --CO--O--CH₃, --CO--O--C₂ H₅, --CO--O--CH₂ --CH₂ --O--CH₃, --CO--N--(CH₃)₂, ##STR10## --CO--CH₂ --O--CH₃, --CO--CH₂ --S--CH₃, ##STR11## and --CO--CH₂ --SO₂ --CH₃.

The following are examples of carbalkoxyalkyl groups:

--CH₂ --COO--Y,

--ch₂ --ch₂ --coo--y,

--ch₂ --ch₂ --ch₂ --coo--y,

--ch₂ --ch₂ --ch₂ --ch₂ --ch₂ --coo--y and

--CH₂ --CH₂ --O--CO--CH₂ --CH₂ --COO--Y,

where Y denotes alkyl, cycloalkyl, aralkyl, hydroxyalkyl, alkoxyalkyl or aroxyalkyl. Specific examples of Y are methyl, ethyl, propyl, butyl, cyclohexyl, benzyl, hydroxyethyl, hydroxybutyl, hydroxyhexyl, methoxyethyl, methoxypropyl, ethoxypropyl, phenoxyethyl and hydroxyethoxyethyl.

Dyes of formula (I) with acyloxyalkyl groups in which the alkyl radical is preferably of the formula --CH₂ --CH₂ --, ##STR12## (CH₂)₃ or --CH₂ --CH₂ --O--CH₂ --CH₂ -- are of particular industrial significance. Preferred acyl radicals are: formyl, acetyl, acetoacetyl, phenoxyacetyl and phenylacetyl. Dyes having two formyl groups have special significance

The radical D may be derived for example from the following amines:

aniline, o-toluidine, m-toluidine p-toluidine, o-nitroaniline, m-nitroaniline, p-nitroaniline, o-cyanoaniline, m-cyanoaniline, p-cyanoaniline, 2,4-dicyanoaniline, p-chloroaniline, 3,4-dichloroaniline, 2,5dichloroaniline, 2,4,5-trichloraniline, 2,4,6-trichloroaniline o-bromoaniline, m-bromoaniline, p-bromoaniline, 2,4,6-tribromoaniline, 2-chloro-4-nitroaniline, 2-bromo-4-nitroaniline, 2-cyano-4-nitroaniline, 1-amino-4-methyl-2-nitrobenzene, 1-amino-4-methoxy-2-nitrobenzene, 1-amino-4-chloro-2-nitrobenzene, 2-cyano-4-nitro-6-bromoaniline, 2-cyano-4-nitro-6-chloroaniline, 1-amino-2-methyl-4-nitrobenzene, 1-amino-2-trifluoromethyl-4-chlorobenzene, 1-amino-2-methoxy-4-nitrobenzene, N-benzoyl-p-phenylenediamine, N-acetyl-p-phenylenediamine, N-phenylsulfonyl-p-phenylenediamine, N-phenylsulfone-m-phenylenediamine, 4-aminoacetophenone, 4-aminobenzophenone, 2-aminobenzophenone, 4-methylsulfonylaniline, 2-aminodiphenylsulfone, methyl 2-aminobenzoate, methyl 3-aminobenzoate, methyl 4-aminobenzoate and the corresponding ethyl, propyl, butyl, isobutyl, β-ethylhexyl, cyclohexyl, benzyl, phenyl, β-methoxyethyl, β-ethoxyethyl, β-butoxyethyl, methyldiglycol, ethyldiglycol, methyltriglycol, ethyltriglycol, β-hydroxyethyl, β-acetoxyethyl, β-(β'-hydroxyethoxy)-ethyl, β-hydroxypropyl, γ-hydroxypropyl, δ-hydroxybutyl, and ω-hydroxyhexyl esters of 4-aminobenzoic acid, the methyl, isobutyl, methyldiglycol, β-methoxyethyl, β-butoxyethyl, methyldiglycol, β-acetoxyethyl or butyl ester of 4-nitroanthranilic acid, the dimethyl, diethyl, dipropyl or dibutyl ester of 3-aminophthalic acid, 4-aminophthalic acid, 5-aminophthalic acid or terephthalic acid, the imide, methylimide, propylamide, n-butylamide, isobutylamide, cyclohexylamide, isooctylamide, methoxypropylamide, ethoxypropylamide or anilide of 3-aminobenzoic acid or 4-aminobenzoic acid, the dimethylamide, diethylamide, pyrrolidide, morpholide or N-methyl-N-β-hydroxyethylamide of 2-aminobenzoic acid, 3-aminobenzoic acid or 4-aminobenzoic acid, the diamide or bis-γ-methoxypropylamide of 5-aminoisophthalic acid, the bis-diethylamide of aminoterephthalic acid, the imide, β-hydroxyethylimide, γ-hydroxypropylimide, phenylimide or tolylimide of 3-aminophthalic acid or 4-aminophthalic acid, the β-hydroxyethylimide of 3-amino-6-nitrophthalic acid, the dimethylamide, diethylamide, pyrrolidide, morpholide, or N-methylanilide of 2-aminobenzosulfonic acid, 3-aminobenzosulfonic acid or 4-aminobenzosulfonic acid, the 2'-aminophenyl ester, 3'-aminophenyl ester or 4'-aminophenyl ester of methylsulfonic acid, the 2'-aminophenyl, 3'-aminophenyl or 4'-aminophenyl ester of ethylsulfonic acid, the 2'-aminophenyl, 3'-aminophenyl or 4'-aminophenyl ester of butylsulfonic acid, the 2'-aminophenyl, 3'-aminophenyl or 4'-aminophenyl ester of benzenesulfonic acid, 2,4-dinitro-6-bromoaniline, 2,4-dinitro-6-chloroaniline, 1-amino-2,6-dibromobenzene-4-methylsulfone, 2-chloro-5aminobenzonitrile, 1-aminobenzene-4-methylsulfone, 2-amino-4-chlorobenzonitrile, 1-amino-2,6-dichlorobenzene-4-methylsulfone, the methyl, or methoxyethyl ester of 1-amino-2,4-dinitrobenzene-6-carboxylic acid, the 1,8-methoxyethylimide or 1,8-methoxypropylimide of 4-aminonaphthalic acid, 1-amino-4-nitrobenzene-2-methylsulfone, 1-amino-4-nitro-2,6-dicyanobenzene, 2,4-dinitroaniline, 2-amino-6,7-dichlorobenzothiazole, 2-amino-5,6-dichlorobenzothiazole, 1-amino-2-nitrobenzene-4-sulfonic acid n-butylamide, the β-methoxyethylamide of 1-amino-2-nitrobenzene-4-sulfonic acid, 1-aminoanthraquinone, 1-amino-4-chloroanthraquinone, 1-aminonaphthalene, 2-aminonaphthalene, 1-amino-2-ethoxynaphthalene, 4-aminonaphthalic acid butylimide, the propyl ester of 3,5-dichloroanthranilic acid, the β-methoxymethyl ester of 3,5-dibromoanthranilic acid, 5-aminochromanone, 2-aminodiphenyl, 3-aminodiphenylene oxide, 4-aminodiphenylene oxide, 2-amino-3,5-dinitrobenzonitrile, 1-amino-2,4-dinitrobenzene-6-methylsulfone, 2-amino-6-nitrobenzothiazole, 2-amino-6-methylsulfonylbenzothiazle, 2-amino-6-ethylsulfonylbenzothiazole, 2-amino-3-cyano-4-methyl- 5-carbomethoxythiophene, 2-amino-3-cyano-4-methyl- 5-carboethoxythiophene or 2-amino-5-nitrothiophene.

Examples of suitable compounds which can be formed into diazo components of the aminoazobenzene series are:

4-aminoazobenzene, 2',3-dimethyl-4-aminoazobenezene, 3',2-dimethyl-4-aminoazobenzene, 2,5-dimethyl-4-aminoazobenzene, 2-methyl-5-methoxy-4-aminoazobenzene 4'-chloro-2-methyl-5-methoxy-4-aminoazobenzene, 2-methyl-4',5-dimethoxy-4-aminoazobenzene, 4'-hydroxy-4-aminoazobenzene, 4'-hydroxy-3'-methyl-4-aminoazobenzene, 2'-hydroxy-5'-methyl-4-aminoazobenzene, 4'-hydroxy-2-methoxy-4-aminoazobenzene, 4'-hydroxy-2-chloro-4-aminoazobenzene, 4'-hydroxy-2,5-dimethoxy-4-aminoazobenzene, 4-hydroxy-2,6-dichloro-4'-aminoazobenzene, 2,5-dimethoxy-4-aminoazobenzene, 4'-chloro-2,5-dimethoxy-4-aminoazobenzene, 4'-nitro-2,5-dimethoxy-4-aminoazobenzene, 4'-nitro-4-aminoazobenzene, 4'-nitro-2-methyl-5-methoxy-4-aminoazobenzene, 4'-chloro-2-methyl-4-aminoazobenzene, 4'-chloro-2,5-dimethyl-4-aminoazobenzene, benzenazo-4-amino-3-ethyoxynaphthalene and benzeneazo-4-aminonaphthalene or the compounds having the formulae: ##STR13##

For the production of dyes of the formula (I), a diazo compound of an amine of the general formula (II):

    d--nh.sub.2                                                (ii)

may be reacted with a coupling component of the general formula (III): ##STR14## D, R, R¹, R², R³ and X having the meanings given above.

Diazotization of the amines may be carried out as usual. Coupling is also carried out as usual in aqueous medium, with or without adding solvents, in a weakly to strongly acid reaction.

Dyes having acyloxy groups may also be obtained by acylating (introducing acyl into) the hydroxyl groups present in the dye after diazotiazation and coupling. For this purpose the free acids, anhydrides, chlorides or esters on which the acyl radicals are based are suitable and the reactions are conventionally carried out in the presence of an inert diluent or solvent such as monochlorobenzene, dichlorobenzene, trichlorobenzene, tetrahydrofuran, dioxane, dimethylformamide, N-methylpyrrolidone or pyridine.

When free acids are used for the esterification it may be advantageous to add an inorganic or organic acid as a catalyst, for example HCl gas or toluenesulfonic acid. The water formed may be removed from the reaction mixture, for example by evaporation.

When acid anhydrides or chlorides are used for esterification, the corresponding acid may serve as solvent in special cases. Thus for example reactions with acetic anhydride may be carried out in glacial acetic acid as solvent.

When acid chlorides are used as the esterification agent it is advantageous to add acid-binding agents, for exampe sodium carbonate, sodium acetate, magnesium oxide or pyridine to the reaction mixture.

In addition to the said esterification agents, special reference may be made to diketene and isocyanates such as methyl or phenyl isocyanate.

Naturally it is also possible to introduce the carbalkoxy group by subsequent esterification of the dyes containing carboxyl groups by a conventional method.

Production of the coupling components of the formula (II) may be carried out by reaction of 2,6-dichloro-3-cyano-4-methylpyridine or 2,6-dichloro-4-methylpyridine-(3)-carboxamide with an amine of the general formula (IV): ##STR15##

Primary or secondary amines may be used. It is possible by suitable choice of the reaction conditions to substitute the chlorine atoms of the 2,6-dichloro-3-cyano- 4-methylpyridine in stages so that monosubstitution and disubstitution products can be isolated. Reaction conditions which exert influence on the exchange of chlorine atoms include temperature, amine component, molar ratio of the reactants and the diluent or solvent. It is probable that in the first stage of the reaction it is mainly 2-amino-3-cyano-4-methyl-6-chloropyridines that are obtained and these, with or without isolation, may be reacted with the same or different amine radicals. The cyano group may then be converted into the carbamoyl group by a conventional method.

When 2,6-dichloro-3-cyano-4-methylpyridine is reacted with a mixture of different amines with complete exchange of the chlorine atoms, mixtures of coupling components are obtained. When two amines are used, for example a mixture of four coupling components is otained, whereas with a mixture of three amines a mixture of nine coupling components is obtained.

The dye mixtures which can be prepared from these may have substantially better affinity for synthetic fibers than a single dye of the mixture, provided suitable amines are chosen.

When ammonia or volatile amines such as methylamine or ethylamine are chosen as amine components for the production of 2,6-diamino-3-cyano-4-methylpyridine derivatives, it is recommended that solutions of these amines or of ammonia in a solvent which is inert under reaction conditions should be used. Inert solvents for reaction temperatures of up to about 150° C include for example alcohols such as methanol, ethanol and β-methoxyethanol. If the components are allowed to react at higher temperatures, examples of suitable solvents are dimethylformamide, N-methylpyrrolidone, glycol and a glycol ether such as ethylene glycol dimethyl ether.

The liquefied amine itself may be used at superatmospheric pressure and the reaction period prolonged.

Exces amine or conventionally used acid-binding agents such as tertiary amines, magnesium oxide, alkoxides or alkalies may be used to bind the HCl liberated in the reaction.

Examples of amines of the formula (IV) are: ammonia, allylamine, methylamine, ethylamine, n-propylamine, isopropylamine, n-butylamine, isobutylamine, tert-butylamine, isoamylamine, n-hexylamine, isohexylamine, n-octylamine, isooctylamine, 2-ethylbutylamine, 2-ethylhexylamine, cyclohexylamine, β-hydroxyethylamine, β-hydroxypropylamine, γ-hydroxypropylamine, ω-hydroxyhexylamine, β-methoxyethylamine, β-ethoxyethylamine, β-butoxyethylamine, γ-(β'-ethylhexoxy)-propylamine, β-(β'-hydroxyethoxy)-ethylamine, γ-ethoxypropylamine, γ-methoxypropylamine, γ-isopropoxypropylamine, γ-amino-α-N-methylaminopropane, γ-amino-α-N-dimethylaminopropane, α-amino-β -diethylaminoethane, β-amino-β-ethyl-α,γ-propanediol, β-amino-β-methylpropanol, N-ethyl-N-(β-hydroxyethyl)-amine, diethanolamine, dimethylamine, diethylamine, dipropylamine, N-methyl-N-(β-hydroxy)-ethylamine, morpholine, piperidine, piperazine, N-methylpiperazine, pyrrolidine, thiomorpholine-S-dioxide, β-aminoethylthiomorpholine-S-dioxide, N-(γ-aminopropyl)-pyrrolidone, aniline, o-toluidine, m-toluidine, p-toluidine, o-methoxyaniline, m-methoxyaniline, p-methoxyaniline, o-chloroaniline, m-chloroaniline, p-chloroaniline, p-cyanoaniline, m-cyanoaniline, p-cyanoaniline, o-ethoxyaniline, m-ethoxyaniline, p-ethoxyaniline, o-ethylaniline, m-ethylaniline, p-ethylaniline, the methylamide of p-aminobenzoic acid, p-aminobenzoic acid β-methoxyethylamide, 1-amino-4-(β-hydroxyethyl)-benzene, 1-amino-4-(β-hydroxyethoxy)-benzene, N-β-hydroxyethylaniline, N-methylaniline, benzylamine, β-phenylethylamine, 1,3-diaminopropane, 1,2-diaminoethane, 1,2-diaminopropane, 1,6-diaminohexane and 1,4-diaminobutane.

Dyes and dye mixtures of the general formula (Ia): ##STR16## in which

Z² denotes hydrogen, nitro, cyano, chloro, bromo, carbomethoxy, carboethoxy, methylsulfonyl, ethylsulfonyl, methyl or methoxy,

Z denotes hydrogen, nitro, chloro, bromo, cyano, methyl, methoxy, carbomethoxy, carboethoxy, methylsulfonyl or ethylsulfonyl and

Z¹ denotes hydrogen, chloro, bromo, cyano, methyl, methoxy, carbomethoxy, carboethoxy phenylazo, p-nitrophenylazo, p-hydroxyphenylazo, p-methoxyphenylazo, p-chlorophenylazo or methylphenylazo and

R and R² have the meanings given above except hydrogen are of particular industrial interest.

Preferred radicals R and R² are ω-hydroxyhexyl, γ-hydroxypropyl and the radicals having the formulae:

--(CH₂)₂ --O(CH₂)₂ OH, --(CH₂)₃ O(CH₂)₄ OH, --CH₂ CHOHC₆ H₅, --(CH₂)₃ O(CH₂)₂ OC₆ H₅, ##STR17## (CH₂)₃ N(CH₃)₂, --(CH₂)₃ N(C₄ H₉)₂, CH₂ CH₂ OCHO, --CH₂ CH₂ CH₂ OCHO, --CH₂ CH₂ OCOCH₃, --CH₂ CH₂ OCOCH₂ OC₆ H₅, --CH₂ CH₂ CH₂ OCOCH₂ OC₆ H₅, --CH₂ CH₂ OCH₂ CH₂ OCHO, --CH₂ CH₂ OCH₂ CH₂ OCOCH₂ OC₆ H₅, --CH₂ CH₂ OCOCH₂ C₆ H₅ and --CH₂ CH₂ OCH₂ CH₂ OCOCH₂ C₆ H₅.

Preferred dyes not having ester groups in the coupling components are those in which the sum of the carbon atoms of the radicals R and R² amounts to from about 7 to 14, the presence of ether and preferably hydroxy groups being advantageous.

Preferred dyes having ester groups are those having a total of from about 6 to 16 carbon atoms in the radicals R and R².

Moreover the corresponding dyes which contain, as diazo components, a benzoisothiazole or benzothiazole which may bear nitro, chloro, bromo or cyano as a substituent, or a thiadiazole bearing as a substituent an unsubstituted or substituted alkylmercapto radical, or a substituted thiophene are particularly valuable.

The following are examples of particularly valuable diazo components:

1-amino-4-nitrobenzene,

1-amino-3-chloro-4-nitrobenzene,

1-amino-2-bromo-4-nitrobenzene,

2-amino-5-nitrobenzonitrile,

2-amino-5-chlorobenzonitrile,

3-chloro-4-aminobenzonitrile,

2-chloro-4-aminobenzonitrile,

2-aminobenzonitrile,

2,5-dichloro-4-aminobenzonitrile,

1-amino-2,4-dicyanobenzene,

1-amino-2,4-dicyano-6-chlorobenzene,

2-chloro-4-amino-5-nitrobenzonitrile,

1-amino-2,5-dichloro-4-nitrobenzene,

1-amino-2,6-dichloro-4-nitrobenzene,

1-amino-2,6-dibromo-4-nitrobenzene,

1-amino-2-bromo-4-nitro-6-chlorobenzene,

1-amino-2,4-dinitrobenzene,

1-amino-2,4-dinitro-6-chlorobenzene,

1-amino-2,4-dinitro-6-bromobenzene,

1-amino-4-nitrobenzene-2-methylsulfone,

1-amino-4-nitrobenzene-2-ethylsulfone,

4-aminophenylmethylsulfone,

1-amino-2-chlorobenzene-4-methylsulfone,

1-amino-2,6-dichlorobenzene-4-methylsulfone,

1-amino-2,6-dibromobenzene-4-methylsulfone,

4-aminobenzoic acid esters,

1-amino-4-nitro-2-carboxylic acid esters,

1-amino-2-bromo-4-nitro-6-carboxylic acid esters,

1-amino-2,4-dichloro-6-carboxylic acid esters,

1-amino-2,4-dibromo-6-carboxylic acid esters,

4-aminoazobenzene, 2',3-dimethyl-4-aminobenzene,

4'-hydroxy-2'-methyl-4-aminoazobenzene,

1-amino-2,4-dinitrobenzene-6-carboxylic acid methyl

or methoxy ester, 3,5-dibromo-4-aminoazobenzene,

3',2-dimethyl-4-aminoazobenzene,

2,5-dimethyl-4-aminoazobenzene,

2-methyl-5-methoxy-4-aminoazobenzene,

4'-chloro-2-methyl-5-methoxy-4-aminoazobenzene,

4'-nitro-2,5-dimethoxy-4-aminoazobenzene,

4'-nitro-2-methyl-5-methoxy-4-aminoazobenzene, and

4'-chloro-2-methyl-5-methoxy-4-aminoazobenzene.

The following are particularly valuable heterocyclic diazo components:

2-amino-5-nitrothiazole,

2-amino-4-methyl-5-nitrothiazole,

2-amino-5-phenylthiadiazole-1,3,4,

3-phenyl-5-aminothiadiazole-1,2,4,

3-methylmercapto-5-aminothiadiazole-1,2,4,

3-β-carbomethoxyethylmercapto-5-aminothiadiazole-1,2,4,

3-amino-5-nitro-2,1-benzoisothiazole,

3-amino-5-nitro-7-chloro-2,1-benzoisothiazole,

3-amino-5-nitro-7-bromo-2,1-benzoisothiazole,

3-amino-7-nitrobenzoisothiazole,

4-amino-5-bromobenzoisothiazole,

4-amino-5-bromo-7-nitrobenzoisothiazole,

4-amino-5-cyano-7-nitrobenzoisothiazole,

2-amino-6-nitrobenzothiazole,

2-amino-3-cyano-4-methyl-5-carbomethoxythiophene and

2-amino-3-cyano-4-methyl-5-carboethoxythiophene.

The new dyes are yellow to green blue and are suitable for dyeing acrylonitrile polymer textile material and particularly textile material of synthetic polyamides and cellulose esters, such as secondary cellulose acetate or triacetate, or synthetic linear polyesters such as polyethylene glycol terephthalate or polymers of analogous chemical constitution. Dyeings of unusual brilliance and good color strength are obtained therewith which are distinguished by good fastness properties, particularly fastness to dry-heat pleating and setting and to light.

The following Examples illustrate the invention. Parts and percentages in the following Examples are by weight unless otherwise stated.

PRODUCTION OF COUPLING COMPONENTS EXAMPLE 1

54 parts of 2,6-dichloro-3-cyano-4-methylpyridine is introduced at from 20° to 30° C into a mixture of 90 parts of β-methoxyethylamine and 70 parts of methanol. The mixture is stirred for three hours at 40° C and then 1000 parts of ice-water is added. After acidification with hydrochloric acid to pH 4 to 5, the precipitate which has been deposited is suction filtered and washed with water. 50 parts of the product has 120 parts of β-hydroxyethylamine added to it. The mixture is then stirred for three to four hours at 160° to 170° C. The mixture is then allowed to cool to 120° C, poured while stirring on to 500 parts of ice and 500 parts of water and acidified with hydrochloric acid to pH 5 to 6. About 50 parts of a dark green oil is obtained which slowly solidifies. The melting point of the crude product is 108° to 111° C.

The probable formula is: ##STR18## The product contains a minor amount of a coupling component of the probable formula: ##STR19##

EXAMPLE 2

187 parts of 2,6-dichloro-3-cyano-4-methylpyridine is gradually added at 20° to 30° C to a mixture of 250 parts by volume of β-hydroxyethylamine and 200 parts by volume of methanol. The mixture is stirred for four to five hours at 40° C and then added with good stirring to 3000 parts of ice-water. The whole is acidified with hydrochloric acid to pH 6 to 4. The deposited precipitate is filtered off, washed with water and dried. 202 parts of a colorless powder is obtained.

100 parts of this powder is boiled under reflux with 300 parts by volume of β-methoxyethylamine for twelve hours. Excess amine is then distilled off, and the residue is stirred into 1500 parts of ice-water and adjusted to pH 6 to 7 with hydrochloric acid. The deposited precipitate is filtered off, washed with water and dried. About 100 to 110 parts of a brownish to colorless powder is obtained of the probable formula: ##STR20## It melts at 78° to 81° C. The product may contain a minor amount of the coupling component of the probable formula: ##STR21##

EXAMPLE 3

220 parts by volume of β-hydroxyethylamine is added to 93 parts of 2,6-dichloro-3-cyano-4-methylpyridine and cautiously heated to 165° to 170° C. The whole is stirred for two to three hours at this temperature, allowed to cool to 120° C, added to 700 parts of ice-water, and the pH is adjusted to 7 to 6. After filtration by suction and drying, 97 parts of a colorless powder is obtained of the formula: ##STR22## m.p. 156° C.

EXAMPLE 4

54 parts of 2,6-dichloro-3-cyano-4-methylpyridine is gradually added at 15° to 35° C while cooling to a mixture of 80 parts of diethylamine and 130 parts by volume of methanol. The mixture is stirred for four hours at 35° C and then poured into 1000 parts of water. After acidification with hydrochloric acid to pH 6, the product is suction filtered and washed with water. After recrystallization from methanol, 50 parts of a colorless powder is obtained of the probable formula: ##STR23## The melting point is 88° to 90° C.

EXAMPLE 5

120 parts by volume of β-hydroxyethylamine is added to 54 parts of the product of the formula: ##STR24## and stirred for two to three hours at 165° C. The whole is then allowed to cool to 110° C and 1000 parts of water and hydrochloric acid is added to set up a pH of 6 to 7. After cooling to room temperature, the oily product obtained is separated from the aqueous phase by a conventional method. It has the probable formula: ##STR25## The product gradually solidifies and melts at 106° to 108° C.

EXAMPLE 6

A mixture of 120 parts by volume of 3-methoxypropylamine and 120 parts by volume of n-hexylamine is added to 100 parts of the product of the formula: ##STR26## m.p. 118° to 120° C.

The mixture is heated under reflux for 12 hours. Excess amine is then distilled off and the residue has added to it 1500 parts of water and hydrochloric acid to set up a pH of 6 to 7. The oil which separates is isolated from the aqueous phase as usual. The yield is about 190 to 220 parts of a dark oil which consists of the coupling components: ##STR27##

EXAMPLE 7

A mixture of 50 parts of β-methoxyethylamine, 50 parts of β-hydroxyethylamine and 25 parts of n-butylamine is allowed to flow at 60° to 100° C into a mixture of 108 parts of 2,6-dichloro-3-cyano-4-methylpyridine and 130 parts of N-methylpyrrolidone. The mixture is then stirred for 10 hours under reflux after which the excess amine is distilled off. The residue has added to it 2000 parts of water and hydrochloric acid up to a pH of 6. The oil which separates is isolated. The yield is about 100 to 115 parts of a mixture of amines having the formula: ##STR28## in which R¹ and R² denote the radicals:

--CH₂ --CH₂ OH, --CH₂ --CH₂ --O--CH₃ or --CH₂ --CH₂ --CH₂ --CH₃ and R¹ and R² may be identical or different.

EXAMPLE 8

54 parts of 2,6-dichloro-3-cyano-4-methylpyridine is gradually added at 35° to 40° C while cooling to a mixture of 30 parts of β-hydroxyethylamine and 30 parts of β-methoxyethylamine in 100 parts of N-methylpyrrolidone. The whole is stirred for 4 to 5 hours at 40° C, 40 parts of n-hexylamine is then added and the mixture is heated for another ten to twelve hours under reflux. Excess amine is then distilled off and 1000 parts of water is added to the residue. After acidification with hydrochloric acid to pH 6 to 5, about 54 parts of a dark oil is obtained which is isolated as usual from the aqueous phase. The product has the formula: ##STR29## in which R¹ and R² denote the radical --CH₂ --CH₂ --OH, --CH₂ --CH₂ --O--CH₃ or --CH₂ --CH₂ --CH₂ --CH₂ --CH₂ --CH₃ and R¹ and R² may be identical or different.

EXAMPLE 9

130 parts of 90% sulfuric acid is added to 50 parts of the product described in Example 8 and stirred for 5 to 6 hours at 80° to 100° C. The whole is then allowed to cool, poured while stirring onto 800 parts of ice and neutralized with 50% caustic soda solution. The mixture is extracted with ethyl acetate and the extractant is distilled off. 48 parts of a dark oil is obtained having the formula: ##STR30## in which R¹ and R² have the meanings given in Example 8.

EXAMPLE 10

250 parts of 90% sulfuric acid is added to 100 parts of 2,6-dichloro-3-cyano-4-methylpyridine and is stirred for 4 to 8 hours at 70° to 100° C, then allowed to cool and the mixture is poured onto 1000 parts of ice while stirring, filtered off and wased with water. About 80 to 90 parts of a colorless powder is obtained having the formula: ##STR31## which melts at 178° C.

IR spectrum: ##STR32##

PRODUCTION OF DYES EXAMPLE 11

25 parts of the product described in Example 10 is heated with 100 parts of β-hydroxyethylamine for 4 hours at 160° to 165° C, allowed to cool, 3000 parts of water is added, the whole acidified with hydrochloric acid to pH 3 to 4, cooled to 0° C and 21.2 parts of a solution of 4-aminoazobenzene which has been diazotized in the usual way is added to the mixture which is then adjusted to pH 1 to 2 with sodium acetate solution. After the coupling is over, the deposited dye is washed with water and dried. About 42 parts of a red brown powder is obtained having the formula: ##STR33## which dissolves in dimethylformamide with a violet color and dyes cellulose esters red shades, polycaprolactam and polyethylene terephthalate cloth full red brown shades with very good fastness properties.

EXAMPLE 12

8.3 parts of the β-methoxyethyl ester of p-aminobenzoic acid is stirred with 100 parts of water and 12 parts of 30% hydrochloric acid. 100 parts of ice and 16 parts by volume of 23% sodium nitrite solution are then added and the whole is stirred for 2 hours at 0° to 5° C. The diazonium salt solution obtained is added gradually at 0° C to a solution of 12.3 parts of 2,6-di-(β-hydroxyethyl)-amino-3-cyano-4-methylpyridine in 350 parts of water and 12 parts by volume of 30% hydrochloric acid. During coupling the pH of the coupling mixture is kept at 0 to 2 by dripping in sodium acetate solution or 50% caustic soda solution. After coupling is over, the deposited dye of the formula: ##STR34## is filtered off, washed with water and dried. A yellow powder is obtained which dissolves in dimethylformamide with an orange yellow color and dyes polycaprolactam and polyethylene terephthalate cloth yellow shades.

Using the diazo components and coupling components of the following Table, other dyes which have similar properties are obtained by methods analogous to the said method:

PCL = polycaprolactam; PETP = polyethylene terephthalate.

    __________________________________________________________________________     Ex.                                                                               Diazo component         Coupling component      acetate                                                                            PCL PETP                __________________________________________________________________________     13                                                                                 ##STR35##                                                                                              ##STR36##              yellow                                                                             yellow                                                                             yellow              14                                                                                 ##STR37##              "                       yellow                                                                             yellow                                                                             yellow              15                                                                                 ##STR38##              "                       yellow                                                                             yellow                                                                             yellow              16                                                                                 ##STR39##              "                       --  yellow-  ish                                                                       yellow-  ish                                                                   red                 17                                                                                 ##STR40##              "                       --  yellow                                                                             yellow              18                                                                                 ##STR41##              "                       --  reddish                                                                            reddish                                                                        yellow              19                                                                                 ##STR42##              "                       reddish  yellow                                                                    reddish yellow                                                                     reddish                                                                        yellow              20                                                                                 ##STR43##              "                       yellow                                                                             yellow                                                                             yellow              21                                                                                 ##STR44##              "                       --  yellow- ish                                                                        yellow-  ish                                                                   red                 22                                                                                 ##STR45##                                                                                              ##STR46##              --  --  yellow              23                                                                                 ##STR47##                                                                                              ##STR48##              yellow                                                                             yellow-  ish                                                                       yellow-  ish                                                                   red                 24 "                                                                                                       ##STR49##              red red red                 25                                                                                 ##STR50##                                                                                              ##STR51##              --  red red                 __________________________________________________________________________

EXAMPLE 26

12.1 parts of 2-amino-3-bromo-5-nitrobenzonitrile is introduced at 0° to 5° while stirring into a mixture of 15 parts of nitrosylsulfuric acid (with a content of 13.1% of dinitrogen trioxide) and 35 parts of concentrated sulfuric acid. The whole is stirred for 4 hours at 0° to 5° C and the diazonium salt mixture is then added gradually to a solution, cooled to 0° C, of 12.3 parts of the coupling component described in Example 5 in 300 parts of water and 12 parts by volume of 30% hydrochloric acid. The pH of the coupling mixture is held at 0 to 1.5 by adding caustic soda solution or sodium acetate. After coupling is over, the deposited precipitate is filtered off, wased with water and dried. A dark red powder of the formula: ##STR52## is obtained which dissolves in dimethylformamide with a violet color and dyes polyethylene terephthalate and polycaprolactam cloth ruby red shades.

By using equivalent amounts of the diazo components and coupling components set out in the following Table and following the procedure described in the foregoing Example, dyes having similar fastness properties are obtained.

Column 1 gives the number of the Example

Column 2 gives the diazo component

Column 3 gives the coupling component

Columns 4, 5 and 6 give the shades of dyeings on cellulose acetate, polycaprolactam and polyethylene terephthalate, respectively.

    __________________________________________________________________________     1  2                  3                    4    5    6                         __________________________________________________________________________     27                                                                                 ##STR53##                                                                                         ##STR54##           yellow                                                                              yellow                                                                              yellow                                          R.sup.1 = C.sub.2 H.sub.5 OH;                                                  R.sup.2, R.sup.3 = C.sub.2 H.sub.5                       28                                                                                 ##STR55##           "                  yellow                                                                              yellow                                                                              yellow                    29                                                                                 ##STR56##         R.sup.1 = CH.sub.2 CH.sub.2 OCH.sub.3 R.sup.2 =                                CH.sub.3 R.sup.3 = CH.sub.2 CH.sub.2 OH                                                             bluish red                                                                          --   --                        30                                                                                 ##STR57##           "                  bluish red                                                                          --   --                        31                                                                                 ##STR58##         R.sup.1 = CH.sub.2 CH.sub.2 OCH.sub.3 R.sup.2 =                                C.sub.2 H.sub.5 R.sup.3 = CH.sub.2 CH.sub.2                                                         blue blue --                        32                                                                                 ##STR59##         R.sup.1 = CH.sub.2 CH.sub.2 OH R.sup.2, R.sup.3 =                              C.sub.2 H.sub.5      --   red  red                       33   "                R.sup.1 = CH.sub.2 CH.sub.2 OH R.sup.2 = CH.sub.2                              CH.sub.2 CH.sub.2 OCH.sub.3 R.sup.3                                                                 red  red  red                       34                                                                                 ##STR60##         X=  CN R.sup.1 = CH.sub.2 CH.sub.2 CH.sub.2                                    OCH.sub.3 R.sup.2 = CH.sub.2 CH.sub.2 OH R.sup.3 =                             H                    --   red  red                       35                                                                                 ##STR61##         R.sup.1 = CH.sub.2 CH.sub.2 CH.sub.2 OCH.sub.3                                 R.sup.2 = CH.sub.2 CH.sub.2 OH R.sup.3                                                              red  bluish red                                                                          bluish red                36   "                R.sup.1 = CH.sub.2 CH.sub.2 OH R.sup.2 = C.sub.6                               H.sub.13 (n) R.sup.3 = H                                                                            --   "    "                         37   "                R.sup.1 = C.sub.6 H.sub.13 (n) R.sup.2 = CH.sub.2                              CH.sub.2 OH R.sup.3 = H                                                                             --   "    "                         38                                                                                 ##STR62##                                                                                         ##STR63##           --   bluish red                                                                          bluish red                39   "                                                                                                ##STR64##           --   "    "                                                ##STR65##                                               40   "                                                                                                ##STR66##           --   "    "                         41                                                                                 ##STR67##                                                                                         ##STR68##           --   "    "                                                ##STR69##                                               42   "                                                                                                ##STR70##           bluish red                                                                          "    "                         43                                                                                 ##STR71##                                                                                         ##STR72##           --   red  red                       44   "                R.sup.1, R.sup.2 = CH.sub.2 CH.sub.2 OCH.sub.3,                                                     --   red  red                                             CH.sub.2CH.sub.2OH                                       45                                                                                 ##STR73##         R.sup.1, R.sup.2 =  CH.sub.2 CH.sub.2 CH.sub.2                                 OCH.sub.3, CH.sub.2CH.sub.2OH                                                                       --   red  red                       46                                                                                 ##STR74##         R.sup.1, R.sup.2 = CH.sub.2 CH.sub.2 OH                                                             --   yellow- ish                                                                         yellow- ish red           47                                                                                 ##STR75##         R.sup.1, R.sup.2 = CH.sub.2 CH.sub.2 OCH.sub.3                                 CH.sub.2CH.sub.2OH   --   red  red                       48                                                                                 ##STR76##           "                  --   red  red                       49                                                                                 ##STR77##         R.sup.1, R.sup.2 = CH.sub.2 CH.sub.2 OCH.sub.3                                 CH.sub.2CH.sub.2OH   --   yellow- ish                                                                         yellow- ish red           50                                                                                 ##STR78##                                                                                         ##STR79##           --   red  red                                             R.sup.1 = CH.sub.2 CH.sub.2 CH.sub.2 OCH.sub.3                                 R.sup.2 = H                                              51                                                                                 ##STR80##         R.sup.1, R.sup.2 = CH.sub.2 CH.sub.2 OH, CH.sub.2                              CH.sub.2 CH.sub.2 OCH.sub.3                                                                         --   yellow- ish                                                                         yellow- ish red           52                                                                                 ##STR81##           "                  --   "    "                         53                                                                                 ##STR82##            "                 --   red brown                                                                           red brown                 54                                                                                 ##STR83##           "                  --   "    "                         55                                                                                 ##STR84##           "                  --   "    "                         56                                                                                 ##STR85##           "                  --   blue violet                                                                         blue violet               57   "                R.sup.1, R.sup.2 = C.sub.6 H.sub.13 (n),                                                            --   "    "                                               CH.sub.2 CH.sub.2 OCH.sub.3                              58   "                R.sup.1, R.sup.2 = C.sub.6 H.sub.13 (n),                                                            --   "    "                                               CH.sub.2CH.sub.2OH                                       59                                                                                 ##STR86##                                                                                         ##STR87##           violet                                                                              violet                                                                              violet                    60                                                                                 ##STR88##         R.sup.1, R.sup.2 = CH.sub.2 CH.sub.2 OCH.sub.3                                 CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.2 OH                                                             --   red brown                                                                           red brown                 61                                                                                 ##STR89##         R.sup.1, R.sup.2 = CH.sub.2CHCH.sub.2                                                               --   --   red                       62   "                R.sup.1, R.sup.2 = CH.sub.2CHCH.sub.2                                                               --   red  red                                             CH.sub.2CH.sub.2OH                                       63                                                                                 ##STR90##                                                                                         ##STR91##           bluish red                                                                          bluish red                                                                          bluish red                64                                                                                 ##STR92##           "                  red  red  red                       65                                                                                 ##STR93##           "                  --   blue blue                      66                                                                                 ##STR94##                                                                                         ##STR95##           --   red  red                       67   "                                                                                                ##STR96##           --   --   ruby                      68   "                                                                                                ##STR97##           --   bluish red                                                                          bluish red                69   "                                                                                                ##STR98##           --   "    "                         __________________________________________________________________________

EXAMPLE 70

11.5 parts of the compound of the formula: ##STR99## is stirred with 13 parts by volume of 30% hydrochloric acid and 200 parts of water. The mixture is then cooled to 0° to 5° C, 16 parts by volume of 23% sodium nitrite solution is dripped in and the whole is stirred for two hours at 0° C. After 1 part of sulfamic acid has been added, the diazonium salt mixture is allowed to flow gradually into a solution, cooled to 0° C, of 13.5 parts of the coupling component mixture described in Example 7 in 300 parts of water and 12 parts by volume of 30% hydrochloric acid. Then 10 to 50% caustic soda solution is added until the pH is 1.5. After coupling is over, the precipitated dye mixture of the formula: ##STR100## in which R¹ and R² have the meanings given in Example 7 is isolated. It dissolves in dimethylformamide to give an orange color and dyes polyethylene terephthalate cloth full golden yellow shades.

EXAMPLE 71

13.1 parts of 2,4-dinitro-6-bromoaniline is slowly introduced at 0° C into a mixture of 63 parts of 85% sulfuric acid and 16 parts of nitrosylsulfuric acid (with a content of 13.1% of dinitrogen trioxide). After stirring for four to five hours at 0° C, the diazonium salt mixture is gradually added to a solution, cooled to 0° C, of 13.5 parts of the coupling component mixture described in Example 7 and 1 part of sulfamic acid in 300 parts of water and 13 parts by volume of 30% hydrochloric acid. The whole is stirred for ten minutes and then sodium acetate and ice are added so that the pH of the coupling mixture rises to 1 and the temperature does not exceed 3° C. AFter coupling is over, the deposited dye mixture is suction filtered, washed with water and dried. A dark red powder is obtained which has the formula: ##STR101## in which R¹ and R² have the meanings given in Example 7. The dye mixture dissolves in dimethylformamide with a red violet color and dyes polyethylene terephthalate cloth red shades.

Other dyes are obtained in an analogous way with the diazo components and coupling components set out in the following Table.

    __________________________________________________________________________     1    2                    3                      4   5    6                    __________________________________________________________________________      72                                                                                ##STR102##            Example 7              --  orange                                                                              orange               73                                                                                 ##STR103##            "                      --  "    "                    74                                                                                 ##STR104##            "                      --  "    "                    75                                                                                 ##STR105##            "                      --  red  red                  76                                                                                 ##STR106##            "                      --  bluish red                                                                          bluish red           77                                                                                 ##STR107##            "                      --  yellowish red                                                                       yellowish  red       78                                                                                 ##STR108##            "                      --  "    "                    79                                                                                 ##STR109##            "                      --  "    "                    80                                                                                 ##STR110##            "                      --  red  red                  81                                                                                 ##STR111##            "                      --  orange                                                                              orange               82                                                                                 ##STR112##            "                      --  "    "                    83                                                                                 ##STR113##            "                      --  bluish red                                                                          bluish red           84                                                                                 ##STR114##            "                      --  red  red                  85                                                                                 ##STR115##            "                      --  bluish red                                                                          bluish red           86                                                                                 ##STR116##            "                      --  red  red                  87                                                                                 ##STR117##            "                      --  violet                                                                              violet               88                                                                                 ##STR118##            "                      --  red  red                  89                                                                                 ##STR119##            "                      --  yellowish red                                                                       yellowish red        90                                                                                 ##STR120##            "                      --  red  red                  91                                                                                 ##STR121##            "                      --  red  red                  92                                                                                 ##STR122##            "                      --  "    "                    93                                                                                 ##STR123##            "                      --  "    "                    94                                                                                 ##STR124##            "                      --  "    "                    95                                                                                 ##STR125##            "                      --  red brown                                                                           red brown            96                                                                                 ##STR126##            "                      --  "    "                    97                                                                                 ##STR127##            "                      --  "    "                    98                                                                                 ##STR128##            "                      --  red  red                  99                                                                                 ##STR129##            "                      --  "    "                    100                                                                                ##STR130##            "                      --  "    "                    101                                                                                ##STR131##            "                      --  orange                                                                              orange               102                                                                                ##STR132##            "                      --  "    "                    103                                                                                ##STR133##            "                      --  reddish yellow                                                                      reddish yellow       104                                                                                ##STR134##            "                      reddish yellow                                                                     "    "                    105                                                                                ##STR135##            "                      "   "    "                    106                                                                                ##STR136##            "                          reddish blue                                                                        reddish blue         107                                                                                ##STR137##            "                      --  reddish yellow                                                                      reddish yellow       108                                                                                ##STR138##            "                      --  yellowish red                                                                       yellowish red        109                                                                                ##STR139##            "                      --  yellowish red                                                                       yellowish red        110                                                                                ##STR140##            "                      --  orange                                                                              orange               111                                                                                ##STR141##            "                      --  red  red                  112                                                                                ##STR142##            "                      --  reddish yellow                                                                      reddish yellow       113                                                                                ##STR143##            "                      red violet                                                                         red violet                                                                          red violet           114                                                                                ##STR144##            "                      violet                                                                             violet                                                                              violet               115                                                                                ##STR145##            "                      orange                                                                             orange                                                                              orange               116                                                                                ##STR146##            "                      --  red  red                  117                                                                                ##STR147##            "                      --  blue violet                                                                         blue violet          118                                                                                ##STR148##            "                      --  orange                                                                              orange               119                                                                                ##STR149##            "                      --  red brown                                                                           red brown            120                                                                                ##STR150##            "                      --  red  red                  121                                                                                ##STR151##            "                      --  orange red                                                                          orange red           122                                                                                ##STR152##            "                      --  orange                                                                              orange               123                                                                                ##STR153##            "                      --  "    "                    124                                                                                ##STR154##            Example 8                  blue violet                                                                         blue  violet         125                                                                                ##STR155##            "                          red  red                  126                                                                                ##STR156##            "                          bluish red                                                                          bluish  red          127                                                                                ##STR157##            "                          red  red                  128                                                                                ##STR158##            "                          red  red                  129                                                                                ##STR159##            "                          violet                                                                              violet               130                                                                                ##STR160##            "                          red  red                  131                                                                                ##STR161##            "                          red  red                  132                                                                                ##STR162##            "                          yellow                                                                              yellow               133                                                                                ##STR163##            Example 7              --  yellow                                                                              yellow               134                                                                                ##STR164##            "                      --  yellow                                                                              yellow               135                                                                                ##STR165##            "                      --  "    "                    136                                                                                ##STR166##            "                      --  "    "                    137                                                                                ##STR167##            "                      --  "    "                    138                                                                                ##STR168##            "                      --  yellow                                                                              yellow               139                                                                                ##STR169##            Example 8              --  "    "                    140                                                                                ##STR170##            "                      --  "    "                    141                                                                                ##STR171##            "                      --  "    "                    142                                                                                ##STR172##            "                      --  "    "                    143                                                                                ##STR173##            "                      --  "    "                    144                                                                                ##STR174##            "                      --  "    "                        ##STR175##                                                                 145                                                                                ##STR176##            "                      --  blue blue                 146                                                                                ##STR177##            "                      blue                                                                               "    "                    147                                                                                ##STR178##            "                      violet                                                                             violet                                                                              violet               148                                                                                ##STR179##            "                      --  bluish                                                                              bluish  red          149                                                                                ##STR180##            "                      --  "    "                    150                                                                                ##STR181##            "                      --  "    "                    151                                                                                ##STR182##            "                      violet                                                                             violet                                                                              violet               152                                                                                ##STR183##            "                      --  bluish red                                                                          bluish  red          153                                                                                ##STR184##            "                      --  red  red                  154                                                                                ##STR185##            "                      --  "    "                    155                                                                                ##STR186##            "                      --  bluish red                                                                          bluish  red          156                                                                                ##STR187##            "                      --  "    "                    157                                                                                ##STR188##            "                      --  "    "                    158                                                                                ##STR189##            "                      blue violet                                                                        blue violet                                                                         blue violet          159                                                                                ##STR190##            "                      red red  red                  160                                                                                ##STR191##            "                      yellowish red                                                                      yellowish red                                                                       yellowish  red       161                                                                                ##STR192##            "                      orange                                                                             orange red                                                                          orange red           162                                                                                ##STR193##            "                      orange                                                                             yellowish red                                                                       yellowish red        163                                                                                ##STR194##            "                      bluish red                                                                         bluish red                                                                          bluish red           164                                                                                ##STR195##            "                      "   "    "                    165                                                                                ##STR196##            "                      red red  red                  166                                                                                ##STR197##            "                      orange                                                                             orange                                                                              orange               167                                                                                ##STR198##            "                      --  red  red                  168                                                                                ##STR199##                                                                                            ##STR200##            --  bluish red                                                                          bluish red           169a                                                                               ##STR201##                                                                                            ##STR202##            --  violet                                                                              violet               169b                                                                               ##STR203##                                                                                            ##STR204##            --  reddish blue                                                                        reddish blue         170                                                                                ##STR205##                                                                                            ##STR206##            --  violet                                                                              violet               171                                                                                ##STR207##            "                          blue violet                                                                         blue violet          172                                                                                ##STR208##                                                                                            ##STR209##                blue blue                 173                                                                                ##STR210##                                                                                            ##STR211##            --  blue blue                 174                                                                                ##STR212##            "                          violet                                                                              violet               175                                                                               "                      R.sup.1,R.sup.2 = CH.sub.2 CH.sub.2 OH                                                                    violet                                                                              violet               176                                                                                ##STR213##                                                                                            ##STR214##                violet                                                                              violet               177                                                                               "                                                                               ##STR215##                                       blue blue                 178                                                                                ##STR216##                                                                                            ##STR217##            bluish red                                                                         bluish red                179                                                                                ##STR218##                                                                                            ##STR219##            violet                                                                             violet                    180                                                                               "                                                                                                      ##STR220##                bluish red                                                                          bluish red                                      ##STR221##                                          181                                                                               "                                                                                                      ##STR222##            red red  red                                             ##STR223##                                          182                                                                               "                                                                                                      ##STR224##                                          183                                                                                ##STR225##                                                                                            ##STR226##            red red  red                                             ##STR227##                                          184                                                                                ##STR228##                                                                                            ##STR229##            yellow- ish                                                                        yellowish red                                                                       yellowish red                                  R.sup.1,R.sup.2 =CH.sub.2 CH.sub.2 NH.sub.2                                    CH.sub.2 CH.sub.2 CH.sub.2 OCH.sub.3                 __________________________________________________________________________

EXAMPLE 185

20 parts of the dye mixture (Example 57) having the formula: ##STR230## in which R¹ and R² denote the radicals --CH₂ --CH₂ --O--CH₃ and --C₆ H₁₃ (n) is gradually added at 40° to 60° C with stirring to 100 parts of 85 to 90% sulfuric acid. Stirring is continued for 5 to 8 hours at 60° to 90° C. The whole is then allowed to cool and the solution is poured while stirring onto a mixture of 300 parts of ice and 250 parts of ice-water; the deposited dye mixture is filtered off, washed with water until it is neutral and dried. From 15 to 18 parts of a black powder is obtained of the formula: ##STR231## The powder dissolves in dimethylformamide with a blue color and dyes polycaprolactam and polyethylene terephthalate blue shades.

EXAMPLE 186

100 parts of polyethylene terephthalate is treated for ninety minutes at a temperature of 100° C in a dye liquor consisting of 3000 parts of water, 9 parts of finely divided o-phenylphenol and 0.3 part of the dye from Example 104. The fabric thus dye yellow is then washed with water followed by reductive cleaning for fifteen minutes in a liquor consisting of 3000 parts of water, 3 parts of sodium dithionite and 3 parts of 32% caustic soda solution, again washed with water and dried.

EXAMPLE 187

100 parts of a cloth of secondary cellulose acetate is dyed for 60 minutes at 80° C in a liquor consisting of 3000 parts of water, 1 part of the dye mixture from Example 113 and 3 parts of the reaction product of 1 mole of castor oil with 40 moles of ethylene oxide. A red violet dyeing is obtained.

EXAMPLE 188

100 parts of polyester fibers are dyed as usual with 1 part of the dye specified in Example 150 for one hour at 130° to 135° C in a pressure vessel. The material is then reductively purified in a liquor consisting of 3000 parts of water, 5 parts of sodium dithionite and 5 parts of 25% caustic soda solution for fifteen minutes at 80° to 85° C and then washed with water. A full red brown dyeing is obtained on the polyester fibers. The dyeing is distinguished by excellent fastness to light and good wet fastness.

EXAMPLE 189

100 parts of polyamide cloth is dyed for ninety minutes at 95° to 100° C in a liquor containing 1 part of the dye prepared according to Example 12 in finely divided form and 2 parts of sulfonated sperm oil alcohol in 2000 parts of water. The golden yellow dyeing obtained has good light and wet fastness properties.

EXAMPLE 190

20 parts of p-aminoazobenzene is stirred for several hours at room temperature with 120 parts of water and 0.2 part of the reaction product of oleylamine with about 12 moles of ethylene oxide, 40 parts by volume of 10N hydrochloric acid is added and the whole is made up to 800 parts by volume with ice and water and then at 15° C parts by volume of a 23% solution of sodium nitrite is added and the whole is stirred for two hours at the same temperature. Excess nitrous acid is destroyed in the usual way.

A solution of 25 parts of 2,6-di-β-hydroxyethylamino-3-cyano-4-methylpyridine in 500 parts of water and 25 parts by volume of 10N hydrochloric acid is allowed to flow into the resultant diazonium salt mixture at 10° C. 200 parts of a 55% solution of sodium acetate is then added gradually to the coupling mixture. After the coupling is over, the dye obtained is suction filtered, washed with water and dried at 80° C. A red powder is obtained which dissolves in dimethylformamide with a yellowish red color. Scarlet shades of good color strength and with excellent fastness properties are obtained on fibers of polyterephthalic acid glycol ester.

When equivalent amounts of the diazo components and coupling components set out in the following Table are used and the procedure of the above Example is followed, dyes having similar fastness properties are obtained.

    __________________________________________________________________________                                                           Shade of dyeing on       Ex.                                                    Poly-                                                                              Poly-               No Diazo component          Coupling component         ester                                                                              amide               __________________________________________________________________________     191                                                                                ##STR232##                                                                                              ##STR233##                yellow- ish                                                                        yellow- ish                                                                    red                 192                                                                                ##STR234##              "                          "   "                   193                                                                                ##STR235##              "                          red red                 194                                                                                ##STR236##              "                          red red                 195                                                                                ##STR237##              "                          red red                 196                                                                                ##STR238##              "                          claret                                                                             claret              197a                                                                               ##STR239##              "                          violet                                                                             violet              197b                                                                               ##STR240##              "                          red red                 198                                                                                ##STR241##              "                          violet                                                                             violet              199                                                                                ##STR242##              "                          currant                                                                            currant             200                                                                                ##STR243##                                                                                              ##STR244##                                                                                  ##STR245##   yellow-  ish                                                                       yellow- ish                                                                    red                 201                                                                                ##STR246##                                         "   "                   202                                                                                ##STR247##              "                          "   "                   203                                                                                ##STR248##              "                          red red                 204                                                                                ##STR249##              "                          red red                 205                                                                                ##STR250##              "                          red red                 206                                                                                ##STR251##              "                          red red                 207                                                                                ##STR252##              "                          red red                 207a                                                                               ##STR253##              "                          claret                                                                             claret              207b                                                                               ##STR254##              "                          red red                 __________________________________________________________________________

EXAMPLE 208

A mixture consisting of a solution of 23 parts of 4'-hydroxy-2'-methyl-4-aminoazobenzene in 500 parts by volume of a 1% caustic soda solution and 30 parts by volume of a 23% sodium nitrite solution is allowed to flow over one hour at 0° to 5° C into a mixture of 40 parts by volume of 10N hydrochloric acid, 400 parts of ice, 6 parts by volume of 23% sodium nitrite solution and 4 parts of the reaction product of oleylamine with about 12 moles of ethylene oxide. The whole is stirred for another two hours at 0° to 5° C and then the excess of nitrous acid is destroyed in the usual way.

A solution of 32 parts of 2,6-di-β-methoxyethylamino-3-cyano-4-methylpyridine in 400 parts of water and 12 parts by volume of a saturated sodium acetate solution is allowed to flow into the resultant mixture at 0° to 5° C. After coupling is over, the dye is isolated by suction filtration, washed with water and dried at 80° C. The red powder thus obtained dissolves in 80% acetone with a yellowish red color. Scarlet shades of a high level of fastness are obtained therewith on polyester or polyamide textile material.

When the compounds given in the following Examples are used instead of the said components, dyes having similar properties are obtained.

    __________________________________________________________________________     Ex.                                              Shade of dyeing on            No.                                                                               Diazo component       Coupling component      polyester                                                                             polyamide              __________________________________________________________________________     209                                                                                ##STR255##                                                                                           ##STR256##             yellowish                                                                             yellowish red                                   R.sub.1,R.sub.2 =                                                                  (CH.sub.2).sub.3OCH.sub.3 ;                       210                                                                               "                     R.sub.1,R.sub.2 =                                                                  C.sub.4 H.sub.9 (n) "      "                      211                                                                               "                     R.sub.1,R.sub.2 =                                                                  CH.sub.2CH.sub.2OH, "      "                                                   CH.sub.2CH.sub.2OCH.sub.3                         212                                                                               "                     R.sub.1,R.sub.2 =                                                                  CH.sub.2CH.sub.2OCH.sub.3,                                                                         "      "                                                   CH.sub.2CH.sub.2OH                                213                                                                               "                     R.sub.1,R.sub.2 =                                                                   ##STR257##                                       214                                                                               "                     R.sub.1,R.sub.2 =                                                                   ##STR258##         "      "                      215                                                                               "                     R.sub.1,R.sub.2 =                                                                   ##STR259##         "      "                      215a                                                                              "                     R.sub.1,R.sub.2 =                                                                   ##STR260##         "      "                      __________________________________________________________________________

EXAMPLE 216

32 parts of nitrosylsulfuric acid 40%) is added at 15° C to a solution of 35.5 parts of 3,5-dibromo-4-aminoazobenzene in 600 parts by volume of glacial acetic acid and the whole is stirred at the same temperature for another 2 hours. Excess nitrosylsulfuric acid is then destroyed in the usual way by adding urea.

A solution of 25 parts of 2,6-di-(β-hydroxyethylamino)-3-cyano-4-methylpyridine in 250 parts of glacial acetic acid is added to the diazo solution at 15° to 20° C. After coupling is over, such an amount of water is added to the reaction mixture that the dye crystallizes out. After suction filtration and washing with water, a brown powder is obtained which dissolves in dimethylformamide with a red color. Red dyeings with outstanding fastness properties are obtained on polyester fibers with the dye.

With the same diazo component and with equivalent amounts of the coupling components given in the following Table, dyes are obtained which give red shades having similar tinctorial properties.

    __________________________________________________________________________      ##STR261##                                                                            R.sup.1          R.sup.2                                               __________________________________________________________________________     EXAMPLE 217                                                                            HOCH.sub.2CH.sub.2                                                                              CH.sub.2CH.sub.2OCH.sub.2CH.sub.2OH                   EXAMPLE 218                                                                            HOCH.sub.2CH.sub.2OCH.sub.2CH.sub.2                                                             CH.sub.2CH.sub.2OCH.sub.2CH.sub.2OH                   __________________________________________________________________________

EXAMPLE 219

A mixture of 56 parts of 2,6-dichloro-3-cyano-4-methylpyridine, 27 parts of β-hydroxyethylamine, 33 parts of β-methoxyethylamine and 33 parts of β-hydroxypropylamine is stirred for 2 hours at 150° C. The reaction mixture is poured into a mixture of 1000 parts of ice-water and 100 parts by volume of 10N hydrochloric acid. The pH is adjusted to 3.5 to 4 by adding 150 parts by volume of 55% sodium acetate solution and the aqueous phase is shaken up three times, each time with 500 parts by volume of ethyl acetate. The combined ester extracts are dried with anhydrous sodium sulfate and the ester is distilled off from the filtrate. 66 parts of a viscous oil remains.

A solution of 28 parts of this product in 300 parts by volume of dimethylformamide is allowed to flow slowly into the diazonium salt solution obtained from 20 parts of 4-aminoazobenzene according to Example 190 at 5° to 10° C. The pH is raised to 3 to 4 by gradually adding 300 parts by volume of 55% sodium acetate solution. The dye thus obtained is isolated by suction filtration, washed with water and dried at 80° C. It is obtained as a red powder which is soluble in 80% aqueous acetone with a yellowish red color and it dyes polyester and polyamide fibers scarlet shades having excellent fastness properties.

When the aminoazobenzenes set out in the following Table are used with the same coupling component, dyes having similar properties are obtained.

    __________________________________________________________________________                                Shade of dyeing on                                  EXAMPLE                                                                              Diazo component      polyester                                                                            polyamide                                                                            acetate                                 __________________________________________________________________________     220                                                                                   ##STR262##          yellowish                                                                            yellowish                                            red                  red                                                221                                                                                   ##STR263##          yellowish                                                                            yellowish                                            red                  red                                                222                                                                                   ##STR264##          yellowish                                                                            yellowish                                                                            yellowish                                      red                  red   red                                          223                                                                                   ##STR265##          yellowish                                                                            yellowish                                            red                  red                                                224                                                                                   ##STR266##          yellowish                                                                            yellowish                                            red                  red                                                225                                                                                   ##STR267##          red   red                                           226                                                                                   ##STR268##          red   red                                           227                                                                                   ##STR269##          red   red                                           228                                                                                   ##STR270##          red   red                                           229                                                                                   ##STR271##          red   red                                           230                                                                                   ##STR272##          claret                                                                               claret                                        __________________________________________________________________________

EXAMPLE 231

1000 parts by volume of a 2.5% aqueous solution of 2-hydroxyethyl-6-aminoethyl-3-cyano-4-methylpyridine is added at 5° to 10° C to the diazonium salt solution obtainable from 20 parts of 4-aminoazobenzene according to Example 190. Coupling is completed by adding 300 parts by volume of a saturated sodium acetate solution. The dye thus obtained is isolated by suction filtration, washed with water and dried. A yellow brown powder is obtained which dissolves in hot water with an orange color. Dyeings prepared therewith on acrylonitrile polymers are orange and have very good fastness properties.

When the derivatives of 4-aminoazobenzene set out in the following Table are used as diazo components instead of 4-aminoazobenzene, dyes having similar tinctorial properties are obtained.

    __________________________________________________________________________                                Shade of dyeing of acrylonitrile                    EXAMPLE                                                                               Diazo component     polymers                                            __________________________________________________________________________     232                                                                                    ##STR273##         orange                                              233                                                                                    ##STR274##         orange                                              234                                                                                    ##STR275##         yellowish red                                       235                                                                                    ##STR276##         yellowish red                                       236                                                                                    ##STR277##         red                                                 237                                                                                    ##STR278##         claret                                              __________________________________________________________________________

    __________________________________________________________________________                                                     Shade of dyeing on             EX. Diazo component        Coupling component   polyamide                                                                              polyester              __________________________________________________________________________     238                                                                                 ##STR279##                                                                                            ##STR280##          red     red                    239                                                                                 ##STR281##                                                                                            ##STR282##          claret  claret                 240                                                                                 ##STR283##            R.sup.1, R.sup.2 = CH.sub.2CH.sub.2OH CH.sub.2C                                H.sub.2OCH.sub.2CH.sub.2OH                                                                          yellowish                                                                              yellowish red          241                                                                                 ##STR284##            R.sup.1, R.sup.2 = CH.sub.2CH.sub.2OH CH.sub.2C                                H.sub.2OCH.sub.2CH.sub.2OH                                                                          violet  violet                 242                                                                                 ##STR285##            R.sup.1, R.sup.2 = CH.sub.2CH.sub.2OH CH.sub.2C                                H.sub.2OCH.sub.2CH.sub.2OH                                                                          red     red                    243                                                                                 ##STR286##            R.sup.1, R.sup.2 = CH.sub.2CH.sub.2OH CH.sub.2C                                H.sub.2OCH.sub.2CH.sub.2OH                                                                          yellowish                                                                              yellowish red          244                                                                                 ##STR287##            R.sup.1, R.sup.2 = CH.sub.2CH.sub.2OCH.sub.2CH.                                sub.2OH              yellowish                                                                              yellowish red          245                                                                                 ##STR288##                                                                                            ##STR289##          yellowish                                                                              yellowish red          246                                                                                 ##STR290##                                                                                            ##STR291##          yellowish                                                                              yellowish red          247                                                                                 ##STR292##                                                                                            ##STR293##          claret  claret                 248                                                                                 ##STR294##            R.sup.1, R.sup.2 = n-C.sub.3 H.sub.9                                                                red     red                    249                                                                                 ##STR295##            R.sup.1, R.sup.2 = n-C.sub.4 H.sub.9                                                                claret  claret                 250                                                                                 ##STR296##                                                                                            ##STR297##          claret  claret                 251                                                                                 ##STR298##                                                                                            ##STR299##          yellowish                                                                              yellowish red          252                                                                                 ##STR300##                                                                                            ##STR301##          yellowish                                                                              yellowish red          253                                                                                 ##STR302##                                                                                            ##STR303##          yellowish                                                                              yellowish red          254                                                                                 ##STR304##                                                                                            ##STR305##          yellowish                                                                              yellowish red          255                                                                                 ##STR306##                                                                                            ##STR307##          red     red                    256                                                                                 ##STR308##                                                                                            ##STR309##          red     red                    257                                                                                 ##STR310##                                                                                            ##STR311##          red     red                    258                                                                                 ##STR312##                                                                                            ##STR313##          red     red                    259                                                                                 ##STR314##                                                                                            ##STR315##          red     red                    260                                                                                 ##STR316##                                                                                            ##STR317##          claret  claret                 261                                                                                 ##STR318##                                                                                            ##STR319##          red brown                                                                              red brown              262                                                                                 ##STR320##            R.sup.1, R.sup.2 = CH.sub.2CH.sub.2OH                                                               red brown                                                                              red brown              263                                                                                 ##STR321##            R.sup.1, R.sup.2 = CH.sub.2CH.sub.2OH CH.sub.2C                                H.sub.2OCH.sub.3     red brown                                                                              red brown              264                                                                                 ##STR322##            R.sup.1, R.sup.2 = CH.sub.2CH.sub.2OH CH.sub.2C                                H.sub.2OCH.sub.3     blue    blue                   265                                                                                 ##STR323##            R.sup.1, R.sup.2 = CH.sub.2CH.sub.2OH                                                               blue    blue                   266                                                                                 ##STR324##            R.sup.1, R.sup.2 = CH.sub.2CH.sub.2OH                                                               blue    blue                   267                                                                                 ##STR325##                                                                                            ##STR326##          blue    blue                   __________________________________________________________________________

Other dyes are obtained by the methods described in the Examples from the components in the following Table:

PCL = polycaprolactam; PETP = polyethylene terephthalate.

    __________________________________________________________________________                                         Shade of dyeing on                         EXAMPLE                                                                              Diazo component                                                                               Coupling component                                                                               acetate                                                                            PCL  PETP                           __________________________________________________________________________     268                                                                                   ##STR327##                                                                                    ##STR328##       red violet                                                                         violet                                                                              violet                                               ##STR329##                                               269   "                                                                                              ##STR330##       --  reddish blue                                                                        reddish blue                                        R.sup.1 = CH.sub.2CH.sub.2OH                              270                                                                                   ##STR331##    R.sup.1,R.sup.2 = CH.sub.2CH.sub.2OH CH.sub.2OHCHCH.s                          ub.3              bluish red                                                                         bluish red                                                                          bluish red                     271   "                                                                                              ##STR332##       bluish red                                                                         bluish red                                                                          bluish red                                          CH.sub.2CH.sub.2CH.sub.2OCH.sub.3                         272                                                                                   ##STR333##    "                 bluish red                                                                         bluish red                                                                          bluish red                     273                                                                                   ##STR334##    "                 bluish red                                                                         bluish red                                                                          bluish red                     274                                                                                   ##STR335##    "                 pure red                                                                           red  red                            275                                                                                   ##STR336##    "                 bluish red                                                                         bluish red                                                                          bluish red                     276                                                                                   ##STR337##    "                 bluish  red                                                                        bluish red                                                                          bluish red                     277                                                                                   ##STR338##    "                 bluish red                                                                         bluish red                                                                          bluish red                     278                                                                                   ##STR339##    R.sup.1,R.sup.2 = CH.sub.2CH.sub.2OH CH.sub.2OHCHCH.s                          ub.3              red red  red                            279                                                                                   ##STR340##    R.sup.1 = CH.sub.2CH.sub.2CH.sub.2OCH.sub.3 R.sup.2                            = CH.sub.2CH.sub.2OH                                                                             blue                                                                               greenish blue                                                                       pure blue                      280   "              R.sup.1 = C.sub.8 H.sub.17 (i)                                                                   --  "    "                                                    ##STR341##                                               281   "                                                                               ##STR342##    blue              "   greenish blue                                            R.sup.2 = CH.sub.2CH.sub.2OH                              282   "                                                                                              ##STR343##       --  green blue                                                                          green blue                                          R.sup.2 = CH.sub.2CH.sub.2OH                              283   "                                                                                              ##STR344##       --  "    "                              R.sup.1 = CH.sub.2CH.sub.2OH                                                   284                                                                                   ##STR345##                                                                                    ##STR346##       yellow- ish red                                                                    yellow- ish red                                                                     yellow- ish red                                     R.sup.1,R.sup.2 = CH.sub.2CH.sub.2OH                                           CH.sub.2CH.sub.2CH.sub.2OCH.sub.3                                               ##STR347##                                               285                                                                                   ##STR348##    "                 red red  red                            286                                                                                   ##STR349##    "                 --  red  red                            287                                                                                   ##STR350##    "                 --  red  red                            288                                                                                   ##STR351##    "                 --  yellow- ish red                                                                     yellow- ish red                289                                                                                   ##STR352##                                                                                    ##STR353##       --  blue green                                                                          blue green                     290                                                                                   ##STR354##                                                                                    ##STR355##       --  greenish blue                                                                       greenish blue                  291                                                                                   ##STR356##                                                                                    ##STR357##       red red  red                            292   "              X = CONH.sub.2    --  red  red                                                 R.sup.1 = CH.sub.2CH.sub.2CH.sub.3                                             R.sup.2 = CH.sub.2CH.sub.2OH                              293   "              X = CONH.sub.2    red red  red                                                 R.sup.1 = CH.sub.2CHCH.sub.3                                                   R.sup.2 = CH.sub.2CH.sub.2OH                              294                                                                                   ##STR358##                                                               ##STR359##                                                                          violet         violet            violet                                  295                                                                                   ##STR360##                                                                                    ##STR361##       --  red  red                            296                                                                                   ##STR362##    X = CONH.sub.2  R.sup.1 = CH.sub.2CH.sub.2OH R.sup.2                           = CH.sub.2CHCH.sub.3                                                                             --  reddish blue                                                                        reddish blue                   __________________________________________________________________________

EXAMPLE 297

64 parts of 2,6-dichloro-3-carboxamido-4-methylpyridine is stirred with 80 parts of n-butylamine for seven hours at 80° to 95° C. Then 60 parts of β-hydroxyethylamine is added and excess butylamine is distilled off. The residue is stirred for 5 to 7 hours at 150° to 170° C and allowed to cool. 100 parts of dimethylformamide and then a mixture of 900 parts of water and 80 parts by volume of 36% hydrochloric acid are added. After cooling to 0° C, 41 parts of a diazotized solution of 2-chloro-4-nitroaniline prepared in the usual way is added to this mixture and then sodium acetate solution is added until the pH is 2.5 After coupling is over, the deposited dye is suction filtered. It has the formula: ##STR363## It is washed with water and dried. A red brown powder is obtained which dissolves in dimethylformamide with a bluish red color and dyes polyethylene terephthalate cloth and also acetate silk red shapes. The full dyeings have very good allround fastness properties.

    __________________________________________________________________________                                   Shade of dyeing on                               EXAMPLE                                                                              Diazo component                                                                             Coupling component                                                                        PETP                                             __________________________________________________________________________     298                                                                                   ##STR364##                                                                                  ##STR365##                                                                               red                                              299   "            X = CONH.sub.2                                                                            bluish red                                                          R = H                                                                          R.sup.1 = CH.sub.2CH.sub.2OH                                                   R.sup.2 = C.sub.4 H.sub.9 (n)                                                  R.sup.3 = H                                                 300                                                                                   ##STR366##  X = CONH.sub.2  R = H  R.sup.1 = CH.sub.2CH.sub.2OH                            R.sup.2 = C.sub.4 H.sub.9 (n)  R.sup.3                                                    red                                              301                                                                                   ##STR367##  X = CONH.sub.2  R = H  R.sup.1 = CH.sub.2CH.sub.2OH                            R.sup.2 = C.sub.4 H.sub.9 (n)  R.sup.3                                                    red                                              302                                                                                   ##STR368##    "        red                                              303                                                                                   ##STR369##    "        orange red                                       __________________________________________________________________________

EXAMPLE 304

150 parts of 2,6-dichloro-3-carboxamido-4-methylpyridine is stirred with 250 parts of 2-hydroxypropylamine for five hours at 80° to 95° C, then allowed to cool and 800 parts of ice-water is added. After acidification with hydrochloric acid to pH 6 to 4, the whole is stirred for another hour at 0° C and the precipitated product of the formula: ##STR370## is suction filtered. It has a melting point of 140° C.

25 parts of this compound is heated with 50 parts of β-methoxyethylamine in an autoclave for five to seven hours at 150° to 170° C. The excess of amine is then distilled off and 150 parts of water and hydrochloric acid are added to the residue to set up a pH of 4. The mixture is then cooled to 0° C after which a solution of 16 parts of 2-amino-5-nitrobenzonitrile (diazotized as usual) is added. A pH of 2.5 is set up in the mixture with 50% sodium acetate solution and the precipitated dye of the formula ##STR371## is isolated.

The red brown powder dissolves in dimethyl formamide with a bluish red color and dyes polyethylene terephthalate cloth bluish red shades. The dyeing has very good fastness to light, dry-heat pleating and setting, and washing.

EXAMPLE 305 ##STR372##

15 parts of 2,6-diamino-3-cyano-4-methylpyridine dissolved in a mixture of 15 parts by volume of 10N hydrochloric acid and 200 parts of water is introduced at 10° to 15° C into the diazo solution obtained according to Example 190. The whole is adjusted to pH 3 to 4 with 200 parts by volume of 55% sodium acetate solution to achieve a complete coupling. The isolated and dried dye, which is a brown yellow powder, dissolves in dimethylformamide with a reddish yellow color. Golden yellow dyeings having excellent fastness properties are obtained therewith on polyamide or polyester fibers.

The coupling component is obtained by reacting 94 parts of 2,6-dichloro-3-cyano-4-methylpyridine with 2000 parts by volume of 25% ammonia for five hours at 180° C in an autoclave. It has a melting point of 226° to 227° C.

The following dyes are obtained analogously to the foregoing Examples:

    __________________________________________________________________________                                                            Shade of dyeing         EXAMPLE                                                                              Diazo component      Coupling component          on                      __________________________________________________________________________                                                            PETP                    306                                                                                   ##STR373##                                                                                          ##STR374##                 orange                  307                                                                                   ##STR375##                                                                                          ##STR376##                 orange                  308                                                                                   ##STR377##                                                                                          ##STR378##                 yellowish red           309                                                                                   ##STR379##                                                                                          ##STR380##                 bluish red              310                                                                                   ##STR381##                                                                                          ##STR382##                 red                     311                                                                                   ##STR383##                                                                                          ##STR384##                 bluish red              312                                                                                   ##STR385##                                                                                          ##STR386##                 bluish red              313                                                                                   ##STR387##                                                                                          ##STR388##                 violet                  314                                                                                   ##STR389##          "                           violet                  315                                                                                   ##STR390##          "                           red violet              316                                                                                   ##STR391##          "                           bluish red              317   "                                                                                                    ##STR392##                 bluish red              318   "                                                                                                    ##STR393##                 red                     319                                                                                   ##STR394##                                                                                          ##STR395##                 violet                  320                                                                                   ##STR396##          "                           orange                  321                                                                                   ##STR397##          "                           golden yellow           322                                                                                   ##STR398##          "                           yellowish red           323                                                                                   ##STR399##          "                           yellowish red           324                                                                                   ##STR400##          "                           red                     325                                                                                   ##STR401##          "                           bluish red              326                                                                                   ##STR402##          "                           bluish red              327                                                                                   ##STR403##          "                           reddish blue            328                                                                                   ##STR404##          "                           blue                    329                                                                                   ##STR405##          "                           bluish red              330                                                                                   ##STR406##          "                           bluish red              331                                                                                   ##STR407##          "                           red                     332                                                                                   ##STR408##                                                                                          ##STR409##                 yellowish red           333                                                                                   ##STR410##          "                           yellowish red           335                                                                                   ##STR411##          "                           bluish red              336   "                                                                                                    ##STR412##                 bluish red              337                                                                                   ##STR413##                                      red                     338                                                                                   ##STR414##          "                           bluish red              339                                                                                   ##STR415##                                                                                          ##STR416##                 yellowish red           340                                                                                   ##STR417##          "                           orange                  341                                                                                   ##STR418##                                                                                          ##STR419##                 yellowish red           -342                                                                                  ##STR420##                                                                                          ##STR421##                 red                     343                                                                                   ##STR422##          "                           bluish red              344                                                                                   ##STR423##                                                                                          ##STR424##                 bluish red              345                                                                                   ##STR425##          "                           bluish red              346                                                                                   ##STR426##                                                                                          ##STR427##                 orange (acetate:                                                               orange)                 347                                                                                   ##STR428##                                                                                          ##STR429##                 yellowish red           348                                                                                   ##STR430##          "                           yellowish red           349                                                                                   ##STR431##                                                                                          ##STR432##                 bluish red              350                                                                                   ##STR433##                                                                                          ##STR434##                 yellow (polyamide0                                                             ellow)                  351                                                                                   ##STR435##                                                                                          ##STR436##                 yellowish red           352                                                                                   ##STR437##          "                           yellow (polyamide:                                                             ellow)                  353                                                                                   ##STR438##                                                                                          ##STR439##                 yellow (polyamide:                                                             ellow)                  354                                                                                   ##STR440##          "                           yellowish red           355                                                                                   ##STR441##          "                                                   356                                                                                   ##STR442##                                                                                          ##STR443##                 bluish red              357                                                                                   ##STR444##                                                                                          ##STR445##                 yellow                  358                                                                                   ##STR446##          "                           yellow orange           359                                                                                   ##STR447##                                                                                          ##STR448##                 orange                  360                                                                                   ##STR449##          "                           orange                  361                                                                                   ##STR450##          "                           yellowish red           362                                                                                   ##STR451##          "                           yellowish red           363                                                                                   ##STR452##          "                           yellowish red           364                                                                                   ##STR453##          "                           red                     365                                                                                   ##STR454##          "                           red                     366                                                                                   ##STR455##          "                           bluish red              367                                                                                   ##STR456##          "                           bluish red              368                                                                                   ##STR457##          "                           bluish red              369                                                                                   ##STR458##          "                           bluish red              370                                                                                   ##STR459##          "                           red violet              371                                                                                   ##STR460##          "                           violet                  372                                                                                   ##STR461##          "                           blue violet             373                                                                                   ##STR462##          "                           yellow                  374                                                                                   ##STR463##          "                           red                     375                                                                                   ##STR464##          "                           yellowish red           376                                                                                   ##STR465##                                                                                          ##STR466##                 yellow                  377                                                                                   ##STR467##          "                           orange                  378                                                                                   ##STR468##          "                           orange                  379                                                                                   ##STR469##          "                           yellowish red           380                                                                                   ##STR470##          "                           yellowish red           381                                                                                   ##STR471##          "                           yellowish red           382                                                                                   ##STR472##          "                           red                     383                                                                                   ##STR473##          "                           red                     384                                                                                   ##STR474##          "                           red                     385                                                                                   ##STR475##          "                           red                     386                                                                                   ##STR476##          "                           red                     387                                                                                   ##STR477##          "                           red                     388                                                                                   ##STR478##          "                           bluish red              389                                                                                   ##STR479##          "                           bluish red              390                                                                                   ##STR480##          "                           bluish red              391                                                                                   ##STR481##          "                           red violet              392                                                                                   ##STR482##          "                           blue violet             393                                                                                   ##STR483##          "                           blue violet             394                                                                                   ##STR484##          "                           orange                   ##STR485##                                                                           ##STR486##          red                                                 396                                                                                   ##STR487##                                                                                          ##STR488##                 bluish                  __________________________________________________________________________                                                            red                

EXAMPLE 397 ##STR489##

0.05 mole of a solution of the disodium salt of the above coupling component is allowed to flow gradually at 0° to 5° C into the diazonium salt solution obtained in the usual way from 15 parts of 2-chloro-4-nitro-1-aminobenzene. The coupling mixture is adjusted to pH 3 to 4 by adding 25 parts by volume of a saturated aqueous solution of sodium acetate. The dye obtained is suction filtered, washed with water and dried at 80° C.

It dyes polyester cloth yellowish red shades having good fastness to light and dry-heat pleating and setting.

The following dyes may be prepared in an analogous manner:

    __________________________________________________________________________                                                          Shade of dyeing on        EXAMPLE                                                                              Diazo component                Coupling component                                                                               polyester               398                                                                                   ##STR490##                                                                                                    ##STR491##      orange                   399                                                                                   ##STR492##                                                                                                    ##STR493##      bluish red               400                                                                                   ##STR494##                                                                                                    ##STR495##      yellow (polyamide:                                                             yellow)                  401                                                                                   ##STR496##                    "                yellowish red            402                                                                                   ##STR497##                    "                red                      403                                                                                   ##STR498##                    "                orange                   404                                                                                   ##STR499##                                                                                                    ##STR500##      orange                   405                                                                                   ##STR501##                    "                yellowish red            406                                                                                   ##STR502##                    "                red                      407                                                                                   ##STR503##                                     brilliant bluish                                                               red                      408                                                                                   ##STR504##                                                                                                    ##STR505##      red                      409                                                                                   ##STR506##                    "                yellowish red            410                                                                                   ##STR507##                    "                yellowish red            411                                                                                   ##STR508##                    "                orange                   412                                                                                   ##STR509##                    "                orange                   413                                                                                   ##STR510##                    "                bluish red               414                                                                                   ##STR511##                    "                reddish yellow           415                                                                                   ##STR512##                    "                reddish yellow           416                                                                                   ##STR513##                                                                                                    ##STR514##      yellow                   417                                                                                   ##STR515##                    "                orange                   418                                                                                   ##STR516##                    "                red                      419                                                                                   ##STR517##                    "                red                      420                                                                                   ##STR518##                                                                                                    ##STR519##      red                      421                                                                                   ##STR520##                    "                red                      __________________________________________________________________________      ##STR521##

20 parts of the product obtained by coupling 4-nitro-1-amino-benzene onto 2,6-dihydroxyethylamino-3-cyano-4-methylpyridine is introduced as a dry powder into 250 parts of formic acid with stirring. The mixture is stirred for some hours at 80° C until complete esterification has been achieved as determined by thin-layer chromatography. The dye, which crystallizes out after cooling, is suction filtered, washed with cold methanol and dried at 80° C. A yellowish red powder is obtained which dissolves in acetone or dimethylformamide with an orange color. Orange dyeings with outstanding fastness properties are obtained on polyester articles. The following formic acid esters may be obtained with the same coupling component:

    __________________________________________________________________________                                   Shade of dyeing on                               EXAMPLE                                                                              Diazo component         polyester                                        __________________________________________________________________________     423                                                                                   ##STR522##             orange                                           424                                                                                   ##STR523##             yellowish red                                    425                                                                                   ##STR524##             yellowish red                                    426                                                                                   ##STR525##             red                                              427                                                                                   ##STR526##             red                                              428                                                                                   ##STR527##             red                                              429                                                                                   ##STR528##             red                                              430                                                                                   ##STR529##             bluish red                                       431                                                                                   ##STR530##             bluish red                                       432                                                                                   ##STR531##             bluish red                                       433                                                                                   ##STR532##             yellow                                           434                                                                                   ##STR533##             yellow                                           435                                                                                   ##STR534##             yellow                                           436                                                                                   ##STR535##             yellow                                           437                                                                                   ##STR536##             orange                                           438                                                                                   ##STR537##             orange                                           439                                                                                   ##STR538##             yellowish red                                    440                                                                                   ##STR539##             yellowish red                                    441                                                                                   ##STR540##             yellowish red                                    442                                                                                   ##STR541##             yellowish red                                    443                                                                                   ##STR542##             yellowish red                                    444                                                                                   ##STR543##             blue violet                                      445                                                                                   ##STR544##             red violet                                       __________________________________________________________________________

EXAMPLE 446 ##STR545##

20 parts of the coupling product from 4-nitro-2-cyano-1-amino-benzene and 2,6-di-γ-hydroxypropylamino-3-cyano-4-methylpyridine is esterified with formic acid as described in Example 422. A red dye is obtained which dyes polyesters is clear red shades which exhibit outstanding fastness to light and dry-heat pleating and setting.

When dyes having the same diaminopyridine derivative as coupling component are reacted in an analogous manner with formic acid, the following esters are obtained:

    ______________________________________                                                                      Shade of dyeing                                   EXAMPLE Diazo component      on polyester                                      ______________________________________                                         447                                                                                     ##STR546##          orange                                            448                                                                                     ##STR547##          orange                                            449                                                                                     ##STR548##          yellowish red                                     450                                                                                     ##STR549##          yellowish red                                     451                                                                                     ##STR550##          yellowish red                                     452                                                                                     ##STR551##          yellowish red                                     453                                                                                     ##STR552##          red                                               454                                                                                     ##STR553##          red                                               455                                                                                     ##STR554##          red                                               456                                                                                     ##STR555##          red                                               457                                                                                     ##STR556##          red                                               458                                                                                     ##STR557##          bluish red                                        459                                                                                     ##STR558##          bluish red                                        460                                                                                     ##STR559##          yellow                                            461                                                                                     ##STR560##          yellow                                            462                                                                                     ##STR561##          orange                                            463                                                                                     ##STR562##          yellowish red                                     464                                                                                     ##STR563##          bluish violet                                     465                                                                                     ##STR564##          bluish red                                        ______________________________________                                    

EXAMPLE 466 ##STR565##

20 parts of the unesterified starting dye is stirred in 100 parts by volume of 98% formic acid for 4 hours at 60° C. The reaction product which crystallizes out at room temperature is isolated and dried. The dark red powder dissolves in dimethylformamide giving a claret color and gives ruby dyeings with outstanding fastness properties on polyesters.

When the following diazo components are used equivalent dyes are obtained:

    __________________________________________________________________________     EXAMPLE                                                                              Diazo component      Shade                                               __________________________________________________________________________     467                                                                                   ##STR566##          red                                                 468                                                                                   ##STR567##          yellowish red                                       469                                                                                   ##STR568##          orange                                              470                                                                                   ##STR569##          orange                                              471                                                                                   ##STR570##          yellowish red                                       472                                                                                   ##STR571##          bluish red                                          __________________________________________________________________________

EXAMPLE 473 ##STR572##

20 parts of the starting dye devoid of acetyl groups is dissolved in 100 parts by volume of glacial acetic acid at refluxing temperature. A mixture of 20 parts by volume of glacial acetic acid and 16 parts of acetic anhydride is then gradually introduced. After stirring for 5 hours at 115° C the whole is cooled and the dye is suction filtered and dried. It dyes polyester cloth clear red shades exhibiting excellent fastness properties.

Dyes having similar properties are obtained by the same process with the following diazo components:

    ______________________________________                                         EXAMPLE Diazo component      Shade                                             ______________________________________                                         474                                                                                     ##STR573##          orange                                            475                                                                                     ##STR574##          yellowish red                                     476                                                                                     ##STR575##          yellowish red                                     477                                                                                     ##STR576##          bluish red                                        478                                                                                     ##STR577##          bluish red                                        ______________________________________                                    

EXAMPLE 479 ##STR578##

13 parts of the dried coupling product from diazotized 4-aminoazobenzene and 2,6-dihydroxyethylamino-3-cyano-4-methylpyridine are stirred in 150 parts by volume of acetic anhydride for one hour at 100° C. The reaction product which crystallizes out from the reaction solution upon cooling is suction filtered and washed with methanol. The compound which is obtained as a red powder after drying is soluble in dimethylformamide with a yellowish red color. Red orange shades having excellent fastness properties are obtained therewith on polyester fibers.

Dyes having similar tinctorial behavior are obtained with the diazo components set out in the following Table in an analogous way:

    ______________________________________                                         EXAMPLE  Diazo component     Shade                                             ______________________________________                                         480                                                                                      ##STR579##         orange                                            481                                                                                      ##STR580##         yellowish red                                     482                                                                                      ##STR581##         yellowish red                                     483                                                                                      ##STR582##         red                                               484                                                                                      ##STR583##         bluish red                                        ______________________________________                                          ##STR584##

15 parts of propionic anhydride is added at 100° C to a mixture of 18 parts of the unesterified starting dye and 500 parts by volume of propionic acid and the reaction mixture is stirred at 115° C until complete reaction can be detected. The dye ester which crystallizes out after cooling is suction filtered, washed with methanol and dried. The red powder thus obtained dissolves in 80% acetone with a yellowish red color. Fast scarlet shades are obtained therewith on polyester cloth.

EXAMPLE 486 ##STR585##

20 parts of acetic anhydride diluted with an equal amount of glacial acetic acid is added to a mixture of 200 parts by volume of glacial acetic acid and 20 parts of the dried coupling product of 3-aminophthalic acid-2-hydroxyethylimide and 2,6-di-β-hydroxyethylamio-3-cyano-4-methylpyridine. The reaction mixture is stirred at refluxing temperature until complete esterification has been achieved. The dye which crystallizes out on cooling and is isolated is an orange powder. It gives golden yellow dyeings with outstanding fastness properties on polyester cloth.

EXAMPLE 487 ##STR586##

A mixture of 250 parts by volume of monochlorobenzene, 12.5 parts of phenoxyacetic acid, 2.5 parts of p-toluenesulfonic acid and 21 parts of the coupling product of 4-nitro-2-cyanoaniline and 2-(β-methoxyethylamino)-6-(-β-hydroxyethylamino)-3-cyano-4-methylpyridine is stirred for two hours at 100° C so that complete reaction is achieved. The reaction product crystallizes out on cooling and is dried. It is a red powder which dissolves in dimethylformamide with a red color. Fast clear red shades are obtained on polyester fibers preferably by the high temperature dyeing method at 130° C.

The following dye esters are obtained by this process with the same coupling component and the diazo components indicated:

    ______________________________________                                         Ex.   Diazo component           Shade                                          ______________________________________                                         488                                                                                   ##STR587##               orange                                         489                                                                                   ##STR588##               orange                                         490                                                                                   ##STR589##               yellowish red                                  491                                                                                   ##STR590##               yellowish red                                  492                                                                                   ##STR591##               red                                            493                                                                                   ##STR592##               red                                            494                                                                                   ##STR593##               red                                            495                                                                                   ##STR594##               bluish red                                     496                                                                                   ##STR595##               bluish red                                     497                                                                                   ##STR596##               yellow                                         498                                                                                   ##STR597##               yellow                                         499                                                                                   ##STR598##               yellow                                         ______________________________________                                    

EXAMPLE 500 ##STR599##

A mixture of 16 parts of the unesterified starting dye, 9 parts of phenoxyacetic acid, 2 parts of p-toluenesulfonic acid, 50 parts by volume of monochlorobenzene and 100 parts by volume of dichloroethane is gradually heated to 120° C while distilling off solvent and water of reaction and is stirred at this temperature until complete esterification has been achieved. This may be detected by thin-layer chromatography. Then 100 parts by volume of alcohol is added, the whole is kept for a short time at refluxing temperature and then the dye ester is isolated after cooling. After drying a yellow powder is obtained which dissolves in 80% acetone with a yellow color and gives yellow dyeings having excellent fastness properties on textile polyester material. Polyamide cloth is dyed fast yellow shades.

Dyes may be prepared with the following diazo components by the same process:

    ______________________________________                                         Example                                                                               Diazo component        Shade                                            ______________________________________                                         501                                                                                    ##STR600##            yellow                                           502                                                                                    ##STR601##            yellow                                           503                                                                                    ##STR602##            yellow                                           504                                                                                    ##STR603##            yellow                                           505                                                                                    ##STR604##            orange                                           506                                                                                    ##STR605##                                                             507                                                                                    ##STR606##            yellowish red                                    508                                                                                    ##STR607##            yellowish red                                    509                                                                                    ##STR608##            red                                              510                                                                                    ##STR609##            red                                              511                                                                                    ##STR610##            red                                              512                                                                                    ##STR611##            red                                              513                                                                                    ##STR612##            red                                              514                                                                                    ##STR613##            bluish red                                       515                                                                                    ##STR614##            bluish red                                       516                                                                                    ##STR615##            bluish red                                       517                                                                                    ##STR616##            bluish red                                       518                                                                                    ##STR617##            red violet                                       519                                                                                    ##STR618##            blue violet                                      520                                                                                    ##STR619##            yellowish red                                    ______________________________________                                    

EXAMPLE 521 ##STR620##

Diketene is dripped at 50° C into a mixture of 100 parts by volume of pyridine and 21 parts of the unesterified starting dye until the ester has been completely formed. To isolate the product, 100 parts of water is added at room temperature and the deposited dye is suction filtered, washed with methanol and dried. A red powder is obtained which dissolves in dimethylformamide with a yellowish red color and produces fast scarlet shades on polyester cloth.

EXAMPLE 522 ##STR621##

5 parts of benzoyl chloride is gradually added at 50° C to a mixture of 30 parts by volume of pyridine and 5 parts of unesterified starting dye. As soon as complete esterification has been achieved at 50° C the whole is allowed to cool and the reaction product is isolated by suction filtration, washing with alcohol and drying at 80° C. The red powder thus obtained produces scarlet shades having good fastness properties on polyester fibers.

EXAMPLE 523 ##STR622##

5 parts of chloroacetyl chloride is slowly added at 60° C to a mixture of 5 parts of the unesterified coupling product, 50 parts by volume of glacial acetic acid and 5 parts of hydrous sodium acetate. After esterification is over the reaction product is suction filtered cold, washed with methanol and dried. The red powder dyes polyester cloth fast scarlet shades.

EXAMPLE 524 ##STR623##

A mixture of 21 parts of the unesterified starting dye, 75 parts by volume of pyridine and 20 parts of succinic anhydride is stirred at 50° C until complete esterification has been achieved. The reaction product is cooled, suction filtered, washed with a little ethanol and dried at 80° C. The red powder thus obtained dissolves in dimethylformamide with a red color. Clear red shades having excellent fastness properties are obtained on polyester fibers.

EXAMPLE 525 ##STR624## A mixture of 5 parts of starting dye and 5 parts of maleic anhydride is reacted in 30 parts of pyridine at 50° C until complete esterification has taken place. To isolate the dye, the reaction mixture has added to it a solution of 50 parts of water, 50 parts by volume of alcohol and 50 parts by volume of glacial acetic acid. The dye is suction filtered and dried. It is a red powder and gives scarlet dyeings having good fastness properties on polyester cloth. EXAMPLE 526 ##STR625##

A mixture of 5 parts of starting dye, 3 parts of cyclohexanoic acid and 0.5 part of p-toluenesulfonic acid is stirred at 100° C until complete esterification has taken place. The dye isolated after cooling gives fast and clear red shades on polyester fibers.

EXAMPLE 527 ##STR626##

5 parts of the starting dye is reacted with 5 parts of nicotinic acid in 10 parts by volume of N-methylpyrrolidone as described in Example 500. A red reaction product is obtained which produces red shades having excellent fastness properties on polyester cloth.

EXAMPLE 528 ##STR627##

First 5 parts of starting dye and then 5 parts of succinic ethyl ester chloride are introduced into 15 parts of pyridine and the reaction mixture is then stirred at 50° C until the reaction is over. The dye is isolated cold and dried. It is then a red powder and gives fast and clear red shades on polyester yarn.

EXAMPLE 529 ##STR628##

5 parts of phenyl isocyanate is gradually introduced at 100° C into a mixture of 5 parts pf starting dye and 50 parts of monochlorobenzene. After reaction has taken place the reaction product is suction filtered while hot, washed with alcohol and dried. Pure red shades having excellent fastness properties are obtained on polyester cloth with the red dye powder thus obtained.

EXAMPLE 530 ##STR629##

A mixture of 20 parts of starting dye (R = H), 8.5 parts of phenylacetic acid and 2 parts of p-toluenesulfonic acid is stirred at 100° C, then 100 parts of 1,2-dichloroethane is added and slowly distilled off again to remove water until a temperature of 120° C has been reached. The whole is kept at this temperature until starting dye can no longer be detected by thin-layer chromatography. After cooling to room temperature the dye ester ##STR630## which has crystallized out is suction filtered, washed with a little alcohol and dried. The dark red powder may be dissolved in dimethylformamide with a deep red color and gives red shades having excellent fastness properties on polyester cloth.

EXAMPLE 531

4.7 parts of 2-cyano-1-aminobenzene is stirred with 100 parts of water and 10 parts by volume of 30% hydrochloric acid. Then 120 parts of ice and 12 parts by volume of 23% sodium nitrite solution is added. After stirring for two hours at 0° to 5° C any excess of nitrous acid present is destroyed as usual and the product is filtered. The diazonium solution thus obtained is added in portions to a solution, cooled to 0° to 5° C, of the coupling component of the formula: ##STR631## in 450 parts of water and 10 parts by volume of 30% hydrochloric acid. The mixture is stirred for one hour and then 50% sodium acetate solution is added until the pH of the coupling mixture is 3.

After coupling is over the dye of the formula: ##STR632## is suction filtered, washed with water until neutral and dried. A yellow powder is obtained which dyes polyethylene terephthalate cloth full yellow shades by the carrier and HT methods.

Fast yellow shades are obtained on polyamide fibers.

Production of the coupling component for Example 531

160 parts of the compound having the formula: ##STR633## is heated for 3 hours under reflux with 500 parts by volume of glacial acetic acid and 65 parts by volume of acetic anhydride. After distilling off about 150 parts by volume of glacial acetic acid the whole is allowed to cool to 80° C and the mixture is stirred into 1500 parts of water. The deposited precipitate of the formula: ##STR634## is filtered off, washed with water and dried. 150 parts of a colorless powder is obtained which melts at 78° to 80° C.

EXAMPLE 532

14 parts of the dye of the formula: ##STR635## is suspended in 100 parts by volume of chlorobenzene. 6 parts of 2-ethylhexanoyl chloride and 4 parts of pyridine are added and the mixture is stirred for ten hours at 80° to 100° C. After cooling, 300 parts by volume of methanol, is added and the deposited dye of the formula ##STR636## is suction filtered and washed first with methanol and then with water.

A dark red powder is obtained which dissolves in dimethylformamide with a bluish red color and dyes polyethylene terephthalate cloth dark red shades having very good light fastness.

The following dyes are obtained by the process described in the foregoing Examples:

    __________________________________________________________________________     Example                                                                             Diazo + coupling components               Shade on                        __________________________________________________________________________                                                    polyester                       533                                                                                  ##STR637##                               bluish red                      534                                                                                  ##STR638##                               "                               535                                                                                  ##STR639##                               "                               536                                                                                  ##STR640##                               "                               537                                                                                  ##STR641##                               "                               538                                                                                  ##STR642##                               red                             539                                                                                  ##STR643##                               red                             540                                                                                  ##STR644##                               red                             541                                                                                  ##STR645##                               red                             542                                                                                  ##STR646##                               red                             543                                                                                  ##STR647##                               red                             544                                                                                  ##STR648##                               red                             545                                                                                  ##STR649##                               yellowish red                   546                                                                                  ##STR650##                               yellowish red                   547                                                                                  ##STR651##                               yellowish red                   548                                                                                  ##STR652##                               yellowish red                   549                                                                                  ##STR653##                               yellowish red                   550                                                                                  ##STR654##                               yellowish red                   551                                                                                  ##STR655##                               yellowish red                   552                                                                                  ##STR656##                               red                             553                                                                                  ##STR657##                               yellowish red                   554                                                                                  ##STR658##                               yellowish red                   555                                                                                  ##STR659##                               orange (acetate: golden                                                        yellow)                         556                                                                                  ##STR660##                               yellowish red                   557                                                                                  ##STR661##                               reddish yellow (polyamide:                                                     reddish yellow)                 558                                                                                  ##STR662##                               violet                          559                                                                                  ##STR663##                               red                             __________________________________________________________________________

EXAMPLE 560 ##STR664## Into the diazonium salt solution obtained in the usual way from 17 parts of 2-chloro-4-nitroaniline there are introduced at 0° to 5° C 350 parts by volume of a 0.3 molar aqueous solution of: ##STR665## and then 200 parts by volume of a 50% sodium acetate solution. After coupling is over, the product is suction filtered, washed with water and dried. A mixture of 20 parts of the coupling product thus obtained, 500 parts by volume of ethanol and 1 part of p-toluenesulfonic acid is stirred at the boiling temperature while distilling off a mixture of alcohol and water until complete esterification has been achieved.

The reaction product is suction filtered cold, washed with alcohol and dried. The red powder thus obtained dissolves in 80% acetone with a yellowish red color. It dyes polyester cloth fast scarlet shades.

Dyes having similar properties are obtained after esterification when the following compounds are used as coupling components: ##STR666##

Example 564 ##STR667## A mixture of 15 parts of the coupling product obtained according to Example 560, paragraph 1, 100 parts by volume of 2-ethoxyethanol and 3 parts of p-toluenesulfonic acid is stirred at 105° C until complete reaction has been achieved. The whole is cooled and the reaction product is suction filtered, washed with alcohol and dried. A red powder is obtained which when finely dispersed in the dye liquor gives clear scarlet dyeings of excellent fastness properties on polyesters. EXAMPLE 565 ##STR668##

20 parts of the unesterified starting dye obtained analogously to the first paragraph of Example 560 is esterified with ethanol as described in the first paragraph of Example 560. The isolated reaction product gives fast orange dyeings on polyester cloth.

EXAMPLE 566 ##STR669##

20 parts of the coupling product obtained as described in the first paragraph of Example 560 is reacted as described in Example 564 with 2-ethoxyethanol. After isolation and drying a red powder is obtained which gives fast scarlet dyeings on polyester threads and filaments.

The following dyes are obtained by the process according to the foregoing Examples: ##STR670## 

We claim:
 1. A dye of the formulawhere D is phenyl substituted by chlorine, bromine, methyl, trifluoromethyl, methoxy, nitro, cyano, methylsulfonyl, ethylsulfonyl, phenylsulfonyl, carbalkoxy of a total of 2 to 5 carbon atoms, carbo-β-alkoxyethoxy, said alkoxy having 1 to 4 carbon atoms, or N,N-dialkyl-substituted sulfamoyl, said alkyl having 1 to 3 carbon atoms; phenylazophenyl; phenylazophenyl substituted by chlorine, bromine or nitro; benzthiazolyl; benzthiazolyl substituted by chlorine, methoxy, ethoxy, nitro, cyano, methylsulfonyl or ethylsulfonyl; benzisothiazolyl substituted by chlorine, bromine, cyano or nitro; thiazolyl substituted by cyano or nitro; thienyl substituted by methyl, cyano, nitro, carbalkoxy of a total of 2 to 5 carbon atoms; or thiadiazolyl substituted by phenyl, ethyl, chlorine, bromine, methylmercapto, ethylmercapto or alkoxycarbonylethylmercapto, said alkoxy having 1 to 4 carbon atoms;X is cyano or carbamoyl; one R is allyl; alkyl of 1 to 8 carbon atoms; alkyl of 2 to 6 carbon atoms substituted by hydroxy, alkoxy of 1 to 8 carbon atoms, carboxy, carbalkoxy of a total of 2 to 5 carbon atoms, alkanoyloxy of 1 to 4 carbon atoms, acetoacetoxy, phenoxyacetyl, phenylacetyl, amino, alkylamino or dialkylamino of a total of 1 to 8 carbon atoms; benzyl, phenylethyl phenyl substituted by chlorine, methyl, ethyl, β-hydroxyethyl, β-hydroxyethoxy, methoxy or ethoxy; cyclohexyl; hydroxycyclohexyl; ω-N-pyrrolidonylalkyl, said alkyl having 2 or 3 carbon atoms; CH₂ CH₂ OCH₂ CH₂ OH; (CH₂)₃ O(CH₂)₄ OH; (CH₂)₃ OC₂ H₄ OCH₃ ; (CH₂)₃ OC₂ H₄ OC₆ H₅ ; or ##STR671## and the other R is hydrogen; alkyl of 1 to 8 carbon atoms; alkyl of 2 to 6 carbon atoms substituted by hydroxy, alkoxy of 1 to 8 carbon atoms, carboxy, carbalkoxy of a total of 2 to 5 carbon atoms, alkanoyloxy of 1 to 4 carbon atoms, amino, alkylamino or dialkylamino of a total of 1 to 8 carbon atoms; CH₂ CH₂ OCH₂ CH₂ OH; (CH₂)₃ O(CH₂)₄ OH; or (CH₂)₃ OC₂ H₄ OCH₃.
 2. A dye according to the formula in claim 1, wherein D is phenyl substituted by nitro, cyano, carbomethoxy, methylsulfonyl, ethylsulfonyl, chlorine or bromine.
 3. A dye according to the formula in claim 1 wherein D is benzisothiazolyl substituted by nitro, cyano, chlorine or bromine; thiazolyl substituted by nitro; thiadiazolyl substituted by methylmercapto, ethylmercapto or alkoxycarbonylethylmercapto, said alkoxy having 1 or 2 carbon atoms, thienyl substituted by cyano, nitro, methyl or carbomethoxy; benzthiazolyl; or benzthiazolyl substituted by methoxy, ethoxy, chlorine or nitro.
 4. A dye according to the formula in claim 1, wherein X is cyano.
 5. A dye according to the formula in claim 1, wherein one R is hydrogen, hydroxyalkyl of 2 to 6 carbon atoms or CH₂ CH₂ OCH₂ CH₂ OH and the other R is phenylethyl, CH₂ CH₂ OCH₂ CH₂ OH, ##STR672## (CH₂)₃ O(CH₂)₄ OH, (CH₂)₃ OC₂ H₄ OCH₃ or (CH₂)₃ OC₂ H₄ OC₆ H.sub.
 5. 6. The dye having the formula ##STR673##
 7. The dye having the formula ##STR674##
 8. The dye having the formula ##STR675##
 9. The dye having the formula ##STR676##
 10. The dye having the formula ##STR677##
 11. The dye having the formula ##STR678##
 12. The dye having the formula ##STR679##
 13. The dye having the formula ##STR680##
 14. The dye having the formula ##STR681##
 15. The dye having the formula ##STR682##
 16. The dye having the formula ##STR683## 